Why doesn't Cast while Channeling work with Wither???

Been running an interesting combo ltely.

Blight
+Cast While Channlring
+Firestorm
+Fire Penetration

Spell Totem
+Scorching Ray
+Faster Cast Support
+Increased Duration

Blight is not bad at all on its own, and as a delivery vehicle for FS it is excellent. THe totem I use mostly for the extra fire penetration from Scorching Ray. Much fun to have two channeled skills going at once.

Yeah Blights not worthless. Done right it works well. Doing CWC Blight Vortex for double chaos dip. Easily do breachlords (Havnt tested chayula cause dont wanna buy the spliters) But uber lab and Atziri is no issue.