Fist/blood:
AR/fist:
If there's a a LOT of group damage, I'll swap out Burst Fire for Invigorating Wrath. That probably isn't an option if you're not using Bladed Gauntlets though, as you won't have the Fury ticking up without fist heals.
Blood/fist:
Blood fist is useful for beginner tanks, who may not have very large hp pools. By adding your shields to the hp, you can help them to soak up bigger hits without getting splattered!