Stopped using skull, a quarter bar (which is what you get back 98% of the time) is not worth using.
what would you use instead? exotic armor sucks in D2
Ophidian Aspect is my fall back, the quick ready and reload on weapons is nice, especially since I use The Duke. Other than that, I'm not sure, Nezarics Sin has been suggested which I've been experimenting with, but so far have not had the results others have had, not sure if I'm using it wrong or what. Just have to keep experimenting until I find something I like besides Ophidian.
Crown of Tempest didn't get nerfed. It's still good with Riskrunner for super regen.
If you’re looking for a good synergy exotic for warlocks, nezarec’s sin is a top tier exotic that many people overlook. Pair it with something like recluse or relearn, and you will have near infinite super, melee, and grenades on a very short cooldown.