just type jmtb02 ;o)
The Gem is a wild card that sometimes does nothing (if you don't kill an enemy character) and sometimes sets up amazing situations for you.
Well... I am doing it with 3 clerics as meatshields and a ranger in back. First cleric is massive healer+buffer, second works as dmg dealer(+healer) and third is buffer(+healer). Ranger just deals massive dmg, poison, instant kills, stuns... unimaginable. They can't do me serious dmg, death is just a matter of energy.