Battle for Wintergrasp sure did not lack excitement this evening, when literally half the realm descended onto the snowy plains and attacked the horde fortification. Lag was so bad that no one could possibly even think of any proper strategies or tactics. Got our 2 2nd lieutenant ranks before we had even finished taking all the quests.
The lieu of sieges machines that left the first workshop was just staggering and breaking the walls was just simply about driving up the hill and bashing on the fortress. Targeting, much less actually killing anything was a gamble of cards due to the sick lag, with the game mostly just yelling that your target was not in LOS or range, although to your eyes, seemed like the blood elf paladin-kind-of-thing was still standing calmly in front of you.
Getting a VoA group afterwards took exactly two microseconds and the general consensus was to immediately go for Toravon, the new boss of the instance. The mechanics themselves are extremely simple, but at least during my 25-man group, seemed like the dps could not focus on the simple matter of killing the adds quick enough.
As a tank, your job is extremely simple; stand on top of the other tank and you switch between three stacks of Frostbite debuff. This is essentially just a debuff from the boss’s Frozen Mallet strike that deals periodic frost damage. The latest DBM has already been updated for the fight and each time a stack is applied to a tank, the addon notifies you of it. Occasionally, since the debuff is a Chance-on-hit ability for the boss, the stacks appear irregularly; they may come quickly or slow, but just make sure that your old stacks have faded, before you taunt or you will most certainly die. If you notice that you are building stacks and your partner cannot taunt yet, blow a useful cooldown.
The boss also has a soft enrage timer, in the form of another stacking debuff, Whiteout that is cast over the entire raid every 45 seconds. Each stack increases all frost damage taken by 25%. Eventually, becomes impossible to heal through.
The real tick of the encounter is dealing with the Frozen Orbs that the boss summons every 30 seconds. There are always three at a time and each deals periodic frost damage to everyone within 8 yard radius. It is imperative that all DPS switch to quickly kill the orbs, though might be enough if you just have all your ranged switch. Again, latest DBM has a timer that shows when the orbs are about to spawn.
The only other mechanic is Freezing Ground that freezes and roots the target and those close to him on the floor. This needs to be dispelled away and a sharp disc priest is very good for this job.
The fight is really about controlling the orbs and the debuff on the tanks. If your group can master both tasks, you will likely not have a problem with the encounter.