Just some info on Mortal Ray. I have tested it quite a bit and anything my level and below I have NOT been resisted once. And on the gaze attack, I have been able to land Mortal Ray with my back towards the monster, so I'm leaning towards the spell to be just like a single target nuke. I will get on and test it some more today to make sure my findings are accurate.
I do agree that the 60 kill timer is a bit long, 10 secs like the mob version would be awesome, however 30 secs would be a lot better.