Well, create a dummy spell based on thunderclap. If you want to add the cooldown to the passive just remove the passive and add the dummy spell. Order the unit to use the thunderclap (it won't stop the unit) and start a timer. When the cooldown runs down remove the dummy spell and give the passive back to the unit.
I don't think I'm dealing with quite the same pressures though, at the very least its a significantly smaller system. For the time being I'm just going to put together a quick scrubby box though and hope it works good enough to not make my house toxic
I do know this - xenforo dropped the ball by not keeping the vbulletin reputation comments as a feature. The loss of the Reputation comments data when we switched to Xenforo really was the death knell for the site when it came to all the users that left. I know I missed it so much and I got way less interested in the site when that feature was gone and I run the site.