How about an Enfeebling Magic thread?

[Ketaru]

Anything that stops TP moves is out the windows, its how SE keeps us in check. Anything that hinders monsters casting is also out the window for the same reason. Anything level based wont work, player vs monster level determines too many things to allow a player to change it.

That's reasonable enough, but perhaps they could take a page from what they did with Addle then. Why not a spell that increases the charge up time of mob abilities and also directly reduces the damage dealt by said abilities by a flat 10%? Increased charge time could give more time to Stun, and not gimp the mobs that are immune to Stun. Would work very much in the same way Addle does, at the very least giving groups a little more time to shore up defenses when they see an ability coming.