by the way, if you want to deal massive crit damage, try playing a str-based human barb/wm. i think you can be a wm by lvl 13. weapon focus in greataxe. upgrade it to keen. you will have a crit threat of x4. combined w/ massive str (dump all attribute pts into str, wear str-enhancing belts, gloves, etc), the damage is insane. in chap 3, i dealt a crit dmg of almost/over 200. if you get hold of axe of the culling (easily found very early in the game), the game will be a breeze. that greataxe has a powerful dispel magic ability, quite similar to the holy avenger (usable only by a paladin).
you can also get scythe as a weapon of choice, and get a crit threat of x5. but that would require an extra feat, which a barb is strapped of.
