Archmages - Forever useless at bosses?

But is a loss of 7K MP (assuming you're ult-ing) all that favourable against such a formidable foe? And lag, I think that'll play a factor. >__>

Thats only graphical lag which happens from maybe the first 3 casts (at most) of the ultimate. If your comp cant handle all those ultimates, no way it can handle bosses like this.

Also, Arch Mages are going to wanted, especially F/Ps now. Check the thread by Jones explaining some of the new enemy skills. One of the statues send players out of the map, and is Fire Weak. Gonna need F/Ps and Paladins for that.