Went into Karazhan as enhance and followed most of Vulcanasm's strats through Shade, though I used all PvE gear (all 264 with 2-3 277 pieces). I cleared everything but Nightbane and faced Big Bad Wolf.

Big Bad Wolf: Start by dropping totems towards the middle of the room including Fire Elemental and Tremor. Burn him for the few globals you get before you have to run. Kite, then pop wolves and hero and burn. Kite when you are transformed and burn when you aren't. Pretty straightforward, but it can be frustrating if you get stunned as you are turning to run as little red riding hood. MW heal if wolves aren't up or you get below half health.

Illhoof: Blow up Kil'rek then pop wolves and hero. Keeping down magma totem and using fire nova kills imps as they spawn. He won't sacrifice if you're solo, so it's very easy.

Netherspite: Pull him to the back of the room and stand under the telescope to intercept all 3 beams. Try to dodge in and out of the red beam so you don't get too low on health. You have to burn him before the 2nd round of portals activate or the green beam will do too much healing to keep up with. Probably a good idea to pop cooldowns after you get a few blue beam stacks. Stay in when the banish phase begins to finish him off.

Chess: Kind of a random encounter, the strat I used to win it solo was simply moving the pawn in front of the king one forward, then taking control of the king. After that I used Hero and Sweep to AOE most of the enemies including the enemy king. My pawns mostly died so I could move around pretty freely after that. A lot of luck was involved, so I'm not sure how reliable the strat is.

Prince Malchezaar: Tanked him against a wall, moved if infernals dropped near. Used Fire Ele at the beginning of the fight and waited until phase 2 to pop wolves and hero. A lot of self heals involved, and if I were to do it again I'd spec into improved stormstrike because I had mana issues that caused death a couple of times.

I may try Nightbane again after raid (only pulled him once) but he hit pretty hard so I'm not sure I'll be able to down him.

Geddon:
Tank him near a wall where there is a lower ceiling and save Maelstrom for heals before/during/after the knockup. Wolves/Lust(Hero) ASAP they'll take care of you until about 40% (do for me at least) then save all your Maelstrom's for heals unless you know you can get another 5 stack before the next knockup.

Sulfuron:

Really relying on good RNG with WF procs on the adds. Magma/Fire Nova getting the other adds low making them spread their heals to other targets and not just the one you're attacking. Interupt on the healer you're attacking. Can sometimes take a while but they don't hit too hard so it's not that big of a deal. Real key is the Magma/Fire Nova making the healers spread their heals.

I recently soloed all of MC, though had to do Gehennas (my enhance gear is pretty bad, I died a couple times with him having <30k HP), Sulfuron, and Golemagg as resto. Unless you can get 2 of Sulfuron's adds down quickly you will probably take too much damage due to being unable to dodge/parry when he hits you with the knockdown/stun. I only have 20k hit points as enhance, so it was safer for me to just stand there healing myself as resto. Throughout the fight I repeatedly dropped searing/earthbind totems for them to target with immolate/pain, thus expending their mana, at which point they just died to magma totem/fire nova without being able to heal. Sure, it took about 15 minutes, but better than wiping repeatedly due to bad RNG and suffering the awful run back.

Majordomo was extremely easy. Just pop everything and rambo mode down his adds. Once your wolves die, you can fight away from the fire pit to buy you time to hardcast some heals after a port.

For Rag, I ended up using my Val'anyr mainhand with WF on it (I only have a normal 251 Gutbuster anyways), and Earthliving on my Keleseth's Seducer. I dropped my totems close to the lava and dropped a smoke flare on the correct spot to stand so I wouldn't crater from the knockback. Earth's Grasp and the Stoneclaw Totem glyph really save the day on this fight, and can really help alleviate some of the bad RNG of double knockbacks, bad maelstrom strings, etc. It only took me two waves of sons to kill him, which I consider pretty decent. He even dropped an eye for my trouble!

I recently started soloing old world instances for fun as enhance. My goal was to do all bosses with just my raid spec and so far I’ve full cleared ZG, AQ20, MC, Kara, and have 3 bosses down in AQ40, working on the rest in there. Unless otherwise stated I did every fight in my normal raiding gear. Here are some ‘strats’ for bosses not fully covered yet in this topic:

AQ20
Ayamiss the Hunter: Fairly easy, but a few things to watch out for. You can out range his ranged attack to let the poison debuff fall off without him resetting or anything. Just range him down with FS, LvB, LB, running out as necessary to heal/reset stacks. The adds die fast to FN, or you can use them for mana with SR. At 70% he lands and at this point make sure to not have either your dogs or Fire Ele out, because if you do he will sacrifice you which can lead to 1 shots if you aren’t quick enough with pets killing the grubs. Do note he enrages at 20% and hits quite hard.

MC
Golemagg the Incinerator: Tough fight, gear will probably be the best way to kill this boss as enhance. I wiped on him for awhile before I settled on a strat that is relatively reproducible with my gear level (a few 277s, most 264). The fight is all about cycling cooldowns to survive, with dps cooldowns at the end for his soft enrage. I used dps totems along with Fire Resist totem and pulled with a LvB. From here dps without using any major cooldowns for 1-3 MW HWs. Once you fall behind pop SR and continue to use MW for HW. As soon as your SR falls off pull out your Earth Ele and continue to dps using MW for either HW or chain heal. Once your Earth Ele dies pop dogs and use furious howl on cooldown, also pop Hero along with them and try to burn the boss to dead. I usually go oom sometime while dogs are up so I overlap my SR with hero to try to get the most damage out and push the boss over. The fight is still quite close, but I’ve killed him twice with this method.

Ragnaros: Same positioning and strat as Bur, just using my raid spec. Put Earthliving on your offhand and of course, Fire resist totem. Open with dogs and Hero, I was able to burn him to 40-50% before he submerged. Try to use MW to stay at or near 100% and with a 5 stack of MW waiting. My only real sources of damage were SS, dogs, and ES, with the occasional LB while dogs were up. If you get knocked back without a MW stack just make sure to pop SR and cast a really long heal, praying for resists. I wiped on him for 2 hours trying different things, and after a soft reset I returned with a resistance flask and proceeded to 1 shot him with this strat, and again 1 shot the next full clear. Both kills were with only 1 add phase. I think the extra 50 resist was the game breaker because it removes a lot of RNG wipes at no real stat loss.

AQ40
Since the beginning of BWL isn’t soloable I decided to give AQ40 a try. Trash is mostly skippable and easy regardless, just pop cooldowns and blow it up.

The Prophet Skeram: This boss is a good challenge, and probably not overly gear dependant. My strat consisted of using no pets (boss will MC and reset) and controlled dps. Again once I used a resistance flask this fight got easier, since the main danger in this fight is spam ES from the split phases. I used normal dps totems, along with NR totem. The goal is to have near full HP, SR off cool down, a 5 stack of MW, and magma totem up before each split (75, 50, 25%). You can mount up and run to your side of choosing before you pull the boss, I used the right pillar. Pull the boss and start DPS, getting ready for the 75% transition, once it occurs attack the add that teleports to your pillar and hope it’s a mirror, if not target one of the other 2 and dps them down asap, being proactive with your MW HWs. Do note that anything less than a 4-5 stack of MW will not work, since their ES spam will lock you out. As soon as the 2 adds are dead I swapped my weapons for my resto dagger/shield so I could melee the boss to stop his ES spam, but not push him over to the next phase. Once SR is back up rinse and repeat. I used hero for the 25% transition to ensure victory, but you can use it for any phase.

Battleguard Sartura: 1 shot this boss, her trash is harder than this fight. I popped all my CDs and burned down her guards first with my back to a wall. Once they were down its tank and spank, and although I wished I saved some CDs for her enrage, she still fell over.

Bug Trio: Hardest fight I’ve completed so far. Tried a whole bunch of different strats, was able to kill either Lord Kri or Princess Yauj (healer) first, but settled on a kill order of Lord Kri>Princess Yauj>Vem (classic easy-mode). This fight is probably gear dependant, because the faster you kill the first bug, the easier the 2nd will be. Have a focus shock macro and set Yauj as your focus target. Her heal will heal approximately 20% of their health, so don’t let any get through. This can be easier said than done because of the amount of CC they do, but the rule I came up with was shock as early as possible. Required totems are Tremor, Cleansing and then either Nature Resist or Windfury, of which I chose WF. I pulled with my mount and ran to the alcove to the right of the door leading in, with my totems at the exit of the alcove. Keep your back to the corner whenever possible and pop dogs/hero/SR and have a magma totem down for extra dps. I used Furious Howl on cooldown to ease up on the damage in to let me do more damage. The goal is for Lord Kri to die here and not let any heals land. You can kill him in ~30 seconds. Once he dies run to the next alcove to the right as quickly as possible (rocket boots ftw) and set your totems down, you can get rid of cleansing for either healing stream or mana stream at this point, I also swapped to water shield at this point to make sure I had the mana for shocks (wiped once at 20% on Yauj from going oom and not shocking). At this point play defensively, using MW for HW and keep on top of your kicks. Pop your Fire Ele at some point, but make sure it has enough duration to be up after Yauj dies. Once she goes down adds spawn from her body, so you have to AoE them asap, having SR up for this is preferable. Once it is just Vem left it’s a tank and spank so play careful and you win.

I have yet to be able to kill either Fankriss or Viscidus, but tried each for quite awhile. Fankriss seems like it will be possible, but very luck dependant with teleports and stacking MS falling off, but my best attempts were about 25%. Doing his gauntlet each wipe is very draining. Viscidus might not be soloable at this point as an enh shaman, unless I’m doing something totally wrong. To kill him you need to shatter him. Freezing him (200 hits with either frostbrand or frostshock) is easy since he doesn’t do that much dmg and poison cleansing and nature resist totems help a lot. The problem comes with shattering him. From what I remember you need to hit him a certain number of times (not dependent on dmg?) to get him to shatter, and the window is VERY short. There is a video of a DK soloing it, but he has army of the dead (cheater). I called it quits when I tried to shatter him with 2x 1.3 speed weapons each with windfury, haste dbw proc, engineering glove use, fully stacked haste totem buff, windfury totem, haste pot, earth ele, dogs, and hero (I also gem haste). To this I got him well into the ‘Viscidus Looks Ready to Shatter’ emote, but no explosion. Oh well, maybe if I ever get a TAiaJ I’ll try again…

Advice on these bosses welcomed!

Tried Sapphiron (10) yesterday as Enhancement. Best try I reached the second fly phase, but without timers he just does too much damage in the long run. But with Decurse, Resistance Totem, our damage and heals we are definitely able to kill him sooner or later with better gear. That nice buff in the next patch should also help: "Greater Healing Wave mana cost has been increased by 10%; healing done has been increased by 20%."

See a lot of people using Elemental Resistance Totem.

Since patch 4.0.1 I start using Healing Stream Totem with glyph Glyph of Healing Stream Totem. This way I have a very useful 2 in 1 totem, especially in raid where our pally are not really need to go for Resistance Aura.

As 85 enhacement I solo MC and with and almost solo Karazhan.
In Karazhan the chess event is pure luck to do it. I take the king to 10k health(lowest amount) when my king died, but a guildie has done it. Last boss is easy to solo it.

I've done King Ymiron in Utgarde Pinnacle Heroic. You can easily avoid all other bosses and the king is pretty easy as elemental in full 346 gear and earth elemental ready. The blue proto didn't drop so far for me.

I'm using Totem of Tranquil Mind most of the time to avoid pushback.

Is there a way around having to have two people in the raid? Or do I have to have a friend login under one character, form the raid, then have them log so they can continue on a different character?

If you're the raid leader, and inside the instance, you can kick the other person in your raid group. If they leave, you'll get booted from the instance, but if you kick it doesn't boot you.

I enjoy trying to solo old world stuff. To make the raid, I usually have a friend log on an alt, form raid with them, then log the alt off.

MC and AQ20 are the most profitable instances. Since AQ20 books got turned to grey items worth 10g each, it requires a lot of bag space though. Doom Lord Kazzak and Doomwalker are both insane gold, but on my server I check them 1-2x per day and haven't seen either yet. We have a big bonus to our farming speed for these instances with ghost wolf, definitely makes MC and Kara less of a headache.

Cool things to farm beyond gold - Anzu mount, HMG Kael'Thas mount/pet, AQ40 mounts, Attumen mount, Utgarde Pinnacle mount.

Soloed:
All of MC
All of AQ20 (don't use totems on Ayamiss)
All of Karazahn
Skeram, Sartura, Fankriss, Huhuran in AQ40 - hardest part here is the knockback AE packs.
Several WOTLK heroics.

Failed:
Hyjal - I can get to Winterchill, but I cannot kill him.
Bug Trio / Viscidius - Too many stuns with trio, can't get enough melee hits (even with wolves and elemental and bloodlust) to shatter Visc
Black Temple - Trash is pretty rough, and first boss can't be done solo due to mechanics.
The Eye - While I imagine Void Reaver is doable, the trash was too frustrating for me to persevere.

I plan on trying Magtheridon, Zul'Aman, and Noth 10 in the near future. Other suggestions? I've heard Flame Leviathan is easily soloable. Has anyone messed around in Sunwell or SSC?

Magtheridon is doable as enhancement, but you need to be able to do quite a bit of damage. The only way I managed to do it was to open the fight with spirit wolves and heroism and single target burn each channeler. When all of the other channelers come, I used Earth Elemental totem to tank them for as long as possible to reduce any incoming damage. Generally I saved an LL5 for about 35-40% when the channeler heals and try to kill him before any heal is possible. Shocks are a must.

Void Reaver to me was impossible because the silencing arcane orbs were unavoidable and you can't heal yourself at all.

Hydross I managed to do (barely) by just cycling my cooldowns for every switch between frost and nature forms. Just be very careful about the debuff. The moment it reaches 25% or maybe even a little before, Hydross has to be switched. Make sure to recall all totems as you switch (I've had a ton of problems with searing totem pulling him back and spawning even more adds). Make sure you have the gear to do this fight. With an almost full set of ilvl359 raiding gear, I barely managed to survive this fight.

Lurker Below is very simple to do. Make sure to clear all the adds on the upper platform so you don't get any fish spawns in the water which will really make the fight difficult. Otherwise, I'd suggest staying either inside the water of the middle pool to avoid the knockback or very close to the inner edge of the platform. Ofcourse be submerged to completely avoid his spout. When the adds come, run to one of the outer platforms and just kill the archers there. The melee guardians will teleport to your location and you can take care of them on that platform. This phase is when I would generally save my wolves for to pull the adds off of me.

Leotheras the Blind is a straight burn fight and requires a fair amount of damage. I took almost nothing in terms of damage in human phase, but once he enters his demon phase, be prepared to pop every single cooldown you have to survive. Elemental Resistance Totem is an absolute must. Around 10 stacks or so it will begin to do severe damage to you. At this point, I would pop my spirit wolves and later on Shamanistic Rage. You can do damage at the beginning of the phase, but I'd suggest almost spam healing yourself near the end when he starts hitting you for 15k per hit. You'll make it out of his first demon phase barely alive, but you'll have his human phase to recover. At this point though, you need to push him into his enrage as your debuff falls off and kill him before another full demon phase or you will die.

Al'ar in tempest keep was also doable. There wasn't that much strategy here. Just follow him to each platform and keep yourself healed up. Keep dps'ing him and the adds he spawns until he dies, then get down to the bottom of the room and tank him near a wall to avoid some of the knockback from the adds. If you can quickly escape from all of the fire, it should be almost a tank and spank. Just watch out for his melt armor ability!

The bug trio in AQ40 can be a bit of a pain, but if you tank them in one of the crevices to avoid the knockback, drop tremor and zerg the healer, you shouldn't have a problem.