As a 3/9 BT, 4/5 MH guild, we managed to get a group of our strongest raiders through for our first Bear last night. It was only our second week of attempting the run (we got 3 down in time last week) and was completed with approximately 30 seconds left on the timer. The route that we took was Eagle -> Bear -> Dragonhawk -> Lynx. Our group composition was as following:
G1
Prot Warrior (MT1)
Prot Paladin (MT2)
Enh Shaman
Rogue
Arms Warrior
G2
Resto Shaman
Resto Druid
Shadow Priest
Elem Shaman
Fire Mage
Most of the things that we did were influenced by this thread. To bridge the DPS gap between us and full T6-equipped groups, we had all of our DPS flasked and with food, plus healers with potions/elixirs. After watching Gurgthock's video (for which myself and our group leader is very grateful for seeing - it's worth the download), we basically followed this to pretty much the letter. In particular, I would urge people to pay particular attention to the strategies for the Eagle trash and the hatchers on the Dragonhawk - both of these were very beneficial. In terms of timing, we were ready to pull Eagle with around 16mins left, and we killed Dragonhawk with about 16mins left. These are the only times I paid attention to the timer. Even 16mins left, it was close on the Lynx - we did get real lucky on Scout spawns to the Dragonhawk and the roaming trash pack in the Lynx's room, but had a trash death or two on the way to the Lynx. For a T5-equipped group, I feel 15mins+ to the Lynx gives you a little bit of breathing room.
The main benefit of our group set up was the 3 BL we could use on every boss. We had another Mage instead of our Elem Shaman last week, and while we were initially thinking that a Warlock would provide the best utility/damage, the extra totems and BL probably got us through towards the end. I would certainly recommend 2 or 3 Shaman for those groups that have them available. The only time we really used any AoE was on the packs of hawks on the hawk gauntlet, so we weren't really lacking in that department. The Warlock probably could have done the same personal DPS (and probably more), but the 3rd BL almost certainly outweighed that.
I'll answer dogy's questions too:
1. We had a Prot Paladin on the adds, and he didn't wear any FR.
2. Since we only had one Mage, we largely single-target DPSd them down. The first wave went down pretty easily, then for the second wave, we threw down Fire Elementals from all 3 of our Shamans.
3. We did this, yes. We kill one hatcher quick, and let the other hatch everything. Melee stay on the boss until the first wave are all on the Prot Paladin, then we move over and kill them all quick. The other hatcher moves across and we do the same there, just with Fire Elementals in there too.
4. Nope. As stated, just more efficient for the Shadow Priest to stay on the boss.
We decided our first bear would go to our group organiser, our Enh Shaman - this was nice, since he is a regular raid leader/organiser and often running alt Karazhan. It was also a server first too (afaik), so that made it nice. We've decided to keep the same group for our runs, and simply getting everyone to /roll on the bears from now on. This has lead to a little bit of discontent within the guild (since we basically hen picked the strongest raiders), but the closest comparison I can find is that of an arena team - certain classes and specs lend themselves to this run, and it requires a consistent team and a regular time commitment. T6 guilds can be a little more flexible, but at early BT/MH level, I suggest that sticking to the fairly standard group makeups suggested here.
I hope my input adds to this great thread
