Obviously Guardian Spirit doesn't work in 25-man, but this thread is about the 10-man version. In 25-man, just sacrifice (and battle rez) them if they can't immune it themselves.
I just sit and heal, but we have our tanks rotate at ~4 stacks, unless one of them is playing taxi for our rogue.
Rogue + Holy Paladin go in on any of the Dazzling Destruction pools, and after a while the paladin comes out, rogue stays in until he absolutely has to come out, he gets healed back up, drops his debuff, then gets taxied in by whichever tank was closest to 5
Rest of raid just hangs out at the bar, sipping on their various alcoholic beverages
I just supposed with equal damage going out in 10m heroic it would still be the same deal - by that I mean taking the damage of Blackout in 25 heroic, divide by 25, get how much it should do to each person, multiply by 10, which would still equal out to more than 400k. Guess the numbers are just different. Thanks for the heads up guys =)