Ubrs is fairly simple. The only thing you need is two classes (or pets) that can take hits from Drakkisath. Since he does conflag and drops aggro on the tank for x seconds.

Some classes can two man it easily (resto shaman and bm hunter for example). But the only annoying part really is drakkisath's conflag. You just need something to counter that. (Either a lot of dps to down him instantly or a second capable tank-ish)