For Raze the best thing I did was walk in his regeneratemachine and stay in theat machine whole battle!

!
I tried that and he just pushed me to the back of it and healed. So I got real brave and just clicked on each lever about a dozen times and got the room full of Walking Armor and then jumped around till I found Raze stuck in a cornor and went in for the kill.
This worked so well that I went up two levels fighting him.