### Summary
- [X] Lightning arrow no longer allows SDI
- [X] Lightning arrow now proc's even without arrows
- [X] Fixed NPE with lightning arrow when a monster is already killed.
- [X] Exposes Index/Count on the timer.
- [X] Cleans up abilities
- [X] Combines some spell context/info objects with their timers to reduce allocations
- [X] Fixes a bug where immolating weapon both finishes effect or stops in the wrong order due to a race condition.