I see the fire mage spec link but there isn't one for Frost or Arc? Is there plan for the thread runner to add these or are they just common google search options?
Pardon my ignorance I haven't played mage in a while and plan on coming back.
Thread authors for Arcane and Frost have not yet presented themselves. Hopefully they will, but at this time, they haven't yet surfaced. Thread authors are on a volunteer basis here, and several of the primary authors from past expansions have retired, so we have a void that hasn't yet been filled.
Regarding the standard Arcane Rune of Power rotation, can anybody explain why all guides say that mastery is the way to go and nearly all mages stack mastery?
I've done quite a number of simcraft simulations of my mage and other mages with average item levels from 475 to over 500 using the standard Rune of Power action list. Haste always had higher scale factors than mastery, regardless of whether they were mastery build (nearly all) or haste build (they do exist).
There was only one mage where haste was not better but equal to mastery. It was a haste build mage with more than 11000 haste and mastery seemed to slowly take over.
I have a simple gear question. I'm a lvl 90 arcane mage and am trying to decide if it is worth replacing one trinket for another.
Keeping Relic of Yulon in place, I'm considering replacing LFR version of "ESSENCE OF TERROR" with the VP trink SHOCK CHARGER MEDALLION.
Quick stat breakdown (Int. 16,619)....(SP 25,622)....(hit 15 %)....haste(3349 7.88%)...crit (16.92%0 and Mast (48.08 %)
Essence of Terror has approximately 20% uptime on the Haste buff so that's 6121*0.2 = 1224 Haste (and 1021 Int).
If you use the Medallion on cooldown you have 25% uptime on the Int buff -> 3838*0.25 = 960 Int (and 1152 Haste)
Comparing these numbers, Essence of Terror gives you more Int and more Haste. If you go for Haste, it's not as good as EoT.
For the standard Mastery build you can reforge some of the Medallion's Haste to Mastery and then it's taking over. The Arcane guide at MMO-Champion's forums has a nice simcraft trinket chart for the Mastery build and in this chart, reforged Medallion is better than EoT LFR version.
You won't know for sure if you don't simulate it for your mage yourself though. In both cases they're pretty close and things can change with your current stat weights.
Water elemental in assist stance should not have casting issues, or at least won't have any more casting issues than it would have by macro'ing /petattack into frostbolt or whatever. Sometimes water elemental in assist stance will stop a cast and requeue if you are switching targets frequently or target something behind you.
5.3 addresses the Water Elemental casting issue. From the patch notes:
The following summoned pets/totems will now chain cast their spells with no delay between casts, allowing them to cast their spells more frequently in the same amount of time.
Death Knight: Gargoyle
Druid: Force of Nature (Balance, Restoration), Mirror Image (Symbiosis)
Mage: Mirror Image, Water Elemental
Shaman: Searing Totem
Warlock: Doomguard, Terrorguard, Wild Imp