Ok so I'm trying to release teh generator to kill Barnabus and keep dieing at the moving lava platforms and ever time I die, I get reloaded in some random respawn part and have to trek there all over again...Does he even drop anything that's worth killing him or should I just bail?

if u got igor u need to find book in his lair but he drops only nice mace and ring

meh, his mace is pretty nice, he also drops his ring and the book igor wants. There is also a bounty reward for him.