You create a "melee-based tank, with a focus on damage mitigation" and you're complaining about not being able to deal enough damage?!? Shouldn't you be ensuring that enemies aren't attacking your teammates (even if that means you simply block the enemies movement)?

While I've yet to play the game, isn't there a melee skill that allows you to leap to a target? Also, the damaging field sounds similar to BG where strategy was needed to not kill your party members (I'd ask my mage wtf they were doing).