How about making it a no lag skill on both parties once they initiate combat. Like yelling when attacked. Its automatic. THey should do the same with warcry for warriors, and have the code check for it to see if they are already affected by warcry, if so, then no warcry. If you are not affected already you yell it out upon initiation of combat.

A nice tweak would be to have it an areawide echo, not sure if it already is.

I suppose it could be made so that if you get attacked by a lagging combat move, bash trip legsweep, then you dont yell the warcry. The person who initiated the attack then gets the warcry off as soon as he bashes you or whatever.