I still prefer my "classic" version using Thunderslam + TU balanced axed for permastun the screen with procs, XD. Also, you need a second way for damage the poison inmune mobs... In my case was Physical damage. Why? Well, you can use StormBlast or any other conversion skill, but still you need high physical damage output OR 100% CB. If you also use wolf's doom and TTAD, then you can kill almost all screen in a few hits...
Sadly, you can't use fortress (due his low duration with 1 hard point) in a effective way with that build. Or you can go with KS.