142d divided by 117h = 1.213675214 deaths per hout or 1.21 dph. Thats a lot in my opinion by my computer can't play the game so my opinion might not acount for much.
I never died, on the ahses quest, cause my party was a lvl ranger, a lvl 20 warrior, and me, a lvl 20 summon nec. It was pretty fun though, cause i just stood in one place and summoned bone fiends and bone horrors, i love those missions.