I am a 6 Boxer myself as well. Just got my entire team up to level 80 and all have their epics. Looking to start my next team.

Team #1 consists of Guardian/Templar/Coercer/Dirge/Defiler/Warlock. I have successfully taken on up to 6 lvl 82^^^ groups at once and survived with no casualites

Mush/Amiacia/Holeun/Apha/Shiverz/Frefik/Gukmaster/Murdaina