Here are my findings.
- Hit-capped Aff warlock with Bane vs. boss-level mob.
- Encounter expected to last between 3 and 10 minutes.
- Over 2 minutes, there will always be at least one time during the boss fight where two dots expire at the same time. Our goal is to minimize the number of such times. "Fitness" indicates the amount of casting where you aren't facing a collision.
- The ideal rotation for DoTs to minimize collisions varies with the expected duration of the fight (but not by much).
3-minute fight: 95% fitness, UA, Imm, CoD, Corr, SL
4-minute fight: 94% fitness, Imm, UA, CoD, Corr, SL
5-minute fight: 94% fitness, UA, Imm, Corr, CoD, SL
6-minute fight: 92% fitness, Imm, UA, SL, Corr, CoD
I might get around to writing a Web-based tool that shows you the expected outcome of a given cast order, including buffer space for SL/Life Tap/Dark Pact.