So I’ve carefully done this fight for two weeks as a hands kiter, and both weeks, I have not received credit for killing Deimos in regards to getting the Legendary Armor Collection Achievement. I have:
- Survived the entire fight. This includes NOT going down.
- Applied the heart beforehand.
- Had the heart’s buff on the entire fight, and even still afterwards.
- Did not D/C or otherwise have any gap during the fight.
- Received the chest at the end of the encounter and could loot the trophy chest thing.
Situation:
- I play rev heal/tank kiter, so the first time I never bothered touching the boss.
- The second time I made sure to tag Deimos both when he landed on the platform, and at 1% just in case.
- I have not yet ‘gone below’ except for the 10% mark.
- I have not tagged the ‘Dark Saul’ add.
I have the rest of the hearts, so I am well familiar with how the Crystalline Heart works. I have filed a support ticket both times, and honestly, the response was so bad, it doesn’t even appear that they read what I wrote. (See attached file).