Edit: I missed the fact that this was intended for DW. Ignore what I said, /second Selene. Not even worth testing.
Interesting build. Test it out and post your combat log parses.
The questions I'd be asking are, how does damage taken compare to standard 5/8/5 builds (no Blade Barrier in yours), and how does threat compare to full tree builds (you're missing both the +dmg and +Expertise of TS or RoR, among other things).
I'd also drop Glacier Rot since this build will only use 1 of its 3 abilities, and get CotG instead for DC spam.