What have you done?

[Reynhart]

Delirium gives is different to warriors IR. DRK use Delirium to generate MP in order to use other skills, he does not need any preparation to use it.

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.

Warrior on the other hand has to get DMG boost from Storms eye

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.

and get infuriate charge to change fell cleave into Inner chaos to do even more damage.

Well, basically IR gives you a bit of "cooldown" ressource back while Delirum gives "MP" ressource back. Yep, totally different.

Warriors IR is his cream and butter, DRK delirium is a part of his skill kit, not as important and not as strong.

The exact same skill for the exact same burst window, but for less results. That makes me feel so much better