My druids on horde and alliance, both teams are lvl 60 and I went feral to do it. The method: 1X pounce, run through target on all characters spamming mangle. No target (other than elites) lasts more than 2 hits per character. With improved leader of the pack the healing is enormous, and the trail of dead things is long. If you are having problems with an elite not dying, switch to bearform and continue the fight that way, instashift form, cast 5x rejeuvinate, and shift back. I never trained bearform on my horde toons, so that tells you how often I have problems like that.

Eventually for instances I'd go 1 bearform, 3x moonkin, and 1 resto just to try it out.

Oh yeah, and in AV when everyone rushes vann or drek, then about 15 sec into the fight, cast 5x tranquility. You will probably draw aggro and die, but almost nobody else will. Man people love watching EVERYONE get healed for rediculous amounts of health.