After getting a taste of the playstyle I'm going to make him into a caster : P I'm lazy by nature and its way too much in the way of upkeep to keep switching into stances and diff attacks; pure fortress and thunderslam are doing great - with only the axe and not the shield, at that. (Need to get that!) Warmonger helm seems like the most viable "boss-attack" and so I'll give that a try later on.
Few notes so far.... + skills doesn't help fortress dmg (aside from tiny bit from mountain king synergy)
minion dmg doesn't seem to help either, shame xD
phys/magic/all-spell doesn't help
Only +stats and anything that effects your weapon, or overall dmg, which I will have to tweak 'cuz only 2k fort/slam dmg both (still enough to melt single player nith in hell, I mean MELT)