I know MagSorcs are becoming limited now, but you're talking about buffing the "strongest" solo PvP classes, this thread is not going to end well.
Also I think forcing a Dodge, being untargetable (if done right), being able to reset combat, and giving a guaranteed next crit is enough, it really doesn't need Purge on top of that.
The dark cloak morph, AKA the health based heal one, not the mental OP stealth/dot supress/force miss one.Great idea, buff NB even more.... it's not like it's the strongest class or anything