a mage alone has very low hp
make it a dualclass into a fighter>kensai
and that is truly the best class in BG
more hp>more attacks and a kensai wearing armor
and if u know the BG rules properly a mage dualclassing to kensai wouldn't lose anything(there is no downside in dualclassing it into kensai) since a kensai can't wear any armor anyway
so u only get +points
mage/kensai more hp
more attacks
hardly any spell reduction
well what's more to say
