Here's somethings I found along the way you may or may not find helpful:
Phase 1:
- Once you get the dodge timing for his spinning missile dive, it leaves a perfect windows for a jumbo DLC rot pot which usually triggers rot immediately (depends on your arcane and if multi-player I think).
- When he does the blood flame sword attack, just circle behind him while walking (if you're already in melee range)
Phase 2:
- The timing is tight, but if you dodge the thousand-year-voyage-hug responsively enough it leaves another window for a pot. I prefer frost pots in phase 2.
- If you're just gonna block the orbital lasers you have enough time to throw another frost pot if you're already in range.
- The meter strike is the most volatile aspect of the fight, I learned to save my wondrous physick for this moment to ensure I survive. If you went rot in phase 1 and frost in phase 2, switching back to rot after this attack helps burn him down.
The schadenfreude here is delicious, alas the perils of being such a vehemently player-hostile game publisher 😂