[2.1.0] Scion Blade Vortex (SC Talisman) -- viable?

I really want to try Scion for Blade Vortex, do you think this is viable? My planned skilltree looks like this, any suggestions?

http://poeurl.com/ucT

-157% inc. life
-2,8% life regen
-175% spell damage
-37% inc. cast speed
-90% inc. duration
-30% inc. AoE
-60% inc. AoE damage


Is that too glass cannon? How to improve this?