No, DRK use Delirium to spam Bloodspiller. The MP refill gives barely above one skill (And that's counting natural regeneration),
so it's not game changing at all.
Except that Storm's Eye is braindead to maintain, exactly like Darkside. So the difference is a 3GCD delay at the very beginning, that you would need anyway for proper timing with other burst skills.
Well, basically IR gives you a bit of "cooldown" ressource back while Delirum gives "MP" ressource back. Yep, totally different.
The exact same skill for the exact same burst window, but for less results. That makes me feel so much better
