I did a 4x druid team. The last 20 or so levels, I did entirely in the random dungeons. Signing up Tank/Healer/DPSx2 I pretty much never had to wait unless it was really late / early in the AM. I think one of the things that made it go so easily, was having 3 HOts + 3 Heal+HOT (Rejuv + Regrowth) able to be cast inside of a few seconds to the tank.

I enjoyed it quite a bit. There were only 2 fights I couldn't get But I think it was because I was below level. Princess in Maraudon, and Eranikus in ST.

The Bags sucked IMO. I always got caster crap on my tank, and melee crap on the Oomkins and Tree.