Besides the bugs, there are multiple instances of abuse on vampirism, not to mention in my mind they require slight balance adjustments, here we go:
Vampire Drain:
- Range changed to 12 meters
- As according to tool tip, you should be able to drain same target more than once, I'd say 10 seconds interval is decent
- Midnight Drain: Now returns health and magicka instead of health and stamina
Mistform:
Note* The following changes are balance adjustments, and fixes (Ex. Devouring swarm, vampire ulti & mistform abuse):
- The ability now has 0.25 second cast animation (no longer instant)
- Mistform will now dispel ALL positive effects on you (Including buffs, HoTs, vampire ulti etc)
[This is to prevent abuse of Mistform]
Batswarm:
- Radius changed to 12 meters
- Duration changed to 6 seconds
- Damage decreased by 10% to account for increased duration
Undeath:
- Passive reworked
- All hits that deal more than 30% / 15% of characters max health have their damage mitigated by 30% / 50%
- The damage is calculated after resistances [So the mitigated damage already has calculated armor / resistances]
Dark Stalker:
- Now decreases detection radius by 10%
- The detection radius decrease does not stack with any other form of detection radius decrease