You missed my entire point, which is in the basic use of tank cooldowns.

You use Bloodbath, a skill for self-healing over time. Hmm, I wonder what must be happening during that time? Incoming damage? Mitigation would sure help for that. What's that? Tank damage is a healer's concern? Why not get some increased healing too?

Every time you argue for using Bloodbath/Foresight/Conval separately, but STILL paired with other cooldowns, just shows how vestigial they are. If they were combined, it'd be a good button for tanks to press. Currently, they're just mediocre and contribute to button bloat.