Has anyone got anu pointers on how to beat Tartarus on the last level on legendary? I've tried most things, and the only thing I accomplishe was two hours of wasted time running around shooting him before I accidently blew myself of a platform and fell to my death. I had most success when I peppered him with the Carbine, aiming for his feet. His shield went down after a clip, but it didn't make any difference.