I have to disagree. That fight is mostly about positioning and interrupting his fire skill (incinerate I think?) as that is target based AoE murder dot. The lightning balls are easy enough to dodge, but it requires the tank to be away and move the droid around. As a healer, I was murdered more often by that boss than my melee counter parts
EDIT: I usually run with a Shadow (Tank) and two Sents (DPS), and me (Smuggler Healer)