I agree with Dilbert. You need a well geared tank, whether that be a warrior/paladin/druid. Sure, you might have 5 Voidwalkers/Felguards up there, but they will all get mowed down in short order.

We would always take 3 healers, no more no less, to Kara. I understand you're going for nuke city, but I think 2 healers would get overwhelmed.

Also, if it were as easy as a nuke fest, a lot of guilds would be in there doing the same thing by now.

The raiding community, after all, is basically a copy-cat league. Maybe 1% or less actually figure the stuff out and post strats/guides/videos, maybe 5-10% improvise those strats to fit their own needs, and the rest just follow suit.