In full resolve gear I have 25k mit in defensive stance, 17k in off stance. I think that says everything we need to know about tanking in RoS. We just simply don't need mit, and block is as broken as it ever was.
just needs oodles of health and big deeps to skip scripts where possible so it the deeps are low, health bardings, force links will help a lot also 8 points in enhanced vigor and other health AAs