With a bow, Way of the Ranger turns a close range Splitting Arrows into a die button for most opponents, and it will do serious damage to a boss (not to mention extending its effective range and helping with groups). The key to this fight in DKS / D2:DC is to quickly hit both levers to disable the regeneration chambers, then focus on the general before the walking armours can get in the way too much. I basically went left to get that lever, with my creature acting as a distraction in the middle, then across to get the second, turned and fired an explosive arrow at the general, jumped over a walking armour and finished him off with splitting arrows (possibly with another normal attack required; I reloaded and repeated this fight a couple more times, after the D2:ED strategy was ineffective; I didn't even use the levers there, or specifically do anything to block access to the closest regeneration chamber).