I know from a boxing standpoint the hunter is easy to produce decent DPS.

The tanking options are a bit of a challenge as the guardian is highly reactive with events occurring off parries and blocks. The warden's tanking method is a bit of a pain relying on key stroke patterns to produce combat effects. Also the warden seems to lack snap AOE aggro instead needing to build and deliver one of its combat maneuvers.

I would say the simplest box that could handle 6 man content would be 1 guardian, 1 minstrel, and 4 hunters. I boxed 1 guardian, 1 minstrel, 1 captain, 1 champion, 1 runekeeper, and 1 hunter and it was mostly fail. I simply could not get any synergy going between all the classes.