Tank mitigation should be balanced to dungeons

[Shurrikhan]

I want you to explain to me, in detail, just exactly how Bloodwhetting being made per use or...

To be fair, having it be a single flat heal per affected action (i.e., regardless of total damage dealt) would also be a poor choice, since it would likely then slightly underperform relative to Holy Shelltron and Heart of Corundum in AoE situations.

The best way to handle it really is just to return it to healing for a portion of damage dealt. In that way it can balance itself simultaneously for AoE and ST situations, instead of attempting to balance itself for ST and having absurdly high (ST_tuning_point_x_target_count) or increasingly low (ST_tuning_point_only) output.