As a warmage I have put a boss into groggy state 0x solo. level 56. They always end up dieing first....
They die after entering Rage mode, you mean?
If so, then that's normal. AFAIK, Wizard skills don't really fill up groggy so it's quite a pain for that class... I'm also beginning to think it's a bug, since all other classes have at least ONE skill fills up Groggy from level 20-40.
Gladiators: I'm Gone Bear!, Incoming Bear!, Dashing Blow
Knights: Just guessing since I've never tested it, but Spear Jab and Spin it Bear! ?
Hunters: Arrow Shower, Wolf Rush
Marksmen: Gatling Rush, Grenades (Lv. 5 is best for that due to there being 3 grenades), RPG-7 (minor compared to the rest though)
Monk: Rain of Fire. Impossible to get Groggy until you get Spark Rock at level 40, I think.
Wizard: None that I know of! Fire Emblem is the only one that seems to do something, but it's not enough to fill Groggy.
Bandit: Upper Screwdriver, Final Decision (USD fills it more though)
Infiltrator: Don't know yet, cause I don't have one yet myself, but I guess Dagger Throw when there are multiple daggers, possibly Ambush, and Violent Blow.
EDIT: For Infiltrators, Gimlet helps a lot with Groggy at lower levels
Edited by Reviren, 23 September 2011 - 10:44 AM.