Race is definately majorly based on opinion
What I think is since the only WF immunity that PM's dont get is petrification..that advantage is basically null
The Self healing aura that a PM gets has always been enough to keep me up when running in the past, although it has been a while.
A DC higher than 45=less saves in difficult epics i believe
Although WF have more options the benefits from human make them the best imo...although i dont wish to incite a riot with this comment