I've updated the main post with our current thinking based on feedback, some testing, filling in unnamed costs that weren't listed before, etc.
Changes:
- Stanch gives 33% of max health and dings you for -3% max HP
- Unholy Blast changed to Poison damage (name change TBD)
- Penetrating Blast: Changed to Pierce instead of untyped.
- Updated tentative Depravity costs for Confusion, Mass Confusion, Eldritch Ball.