Of Mages and Krosh

Babette is taking care of our Krosh tanking but in the event that he can't make it to one of the raids for any of you interested in the job since our regular is no longer with us and it's always good to have a backup, this is the information you'll need to be successful at the job.

He must be tanked by a mage using the stolen Spell Shield. The mage should have the full, +16% spell hit (202 spell hit rating without the Arcane Focus talent) to minimize the chance of having Spellsteal resisted. With the Arcane Focus talent a mage would need +6% spell hit (76 spell hit rating) from gear. Note that Krosh will only recast Spell Shield when he isn't casting a (4s cast) Greater Fireball. This means that the tanking mage's Spell Shield can fade, and he must take one full damage fireball before he can steal another shield. Greater Fireball hits for 8500–9500 damage. This can be avoided by casting Fire Ward just before Greater Fireball hits tanking mage — Fire Ward will absorb 1220 damage (rank 6). The fire ward will absorb its designated damage whether the stolen Spell Shield is up or not, so time it wisely. The tanking mage should gear for stamina until he reaches a minimum of 10500 health buffed (13k is more ideal). Mana should not be completely disregarded, as repeated Spellstealing is costly (29% of your base mana).
Tip: Better to stop casting before the Spell Shield has around 5 seconds left, cast Fire Ward at 3 seconds left. Then you don't have GCD to worry about when you need to cast Spellsteal. If you can time the Spellsteal 1–2 seconds after his shield is up, that will help reduce the chance that you don't have a Spell Shield to steal in between. Do not cast Fire Ward early because it will be used up even when you have the Spell Shield on you. Save the Fire Ward to help absorb the damage when your Spell Shield is about to fade to reduce the damage from the full Greater Fireball.
Casts Blast Wave AoE which deals roughly 6000 damage and has extremely short (~10 yards) range.
No one should take Blast Wave damage. He is immune to the Curse of Tongues debuff, and his Greater Fireballs ignore resistance gear, grounding totems and spell reflections; stamina and intellect stats are key for the mage.
When doing this fight, depending on when Krosh casts his spell shield ability it is possible to not take a full damage fireball. This does seem to be the luck of the draw, where if you first Spellsteal his shield at an unlucky time he will always be in the middle of casting when the shield buff expires. In these cases, a mage should use Fire Ward and then spam the Spellsteal key to take minimum damage.
See the Mage Stamina Gear List for a list of useful Maulgar tanking items