I like that, better overall, forgot about Purge since i don't have Witchcraft leveled yet.

You trade Purge for Mirror light, which also adds the nice magic defense buff.
Courageous Action is nice for 3rd boss, wonder if you get the immunity even if they are not sleep/fear. Cast on healer as preventative for being slept.

I Would drop bubble for the 2nd passive in Archery. More DPS, you should not have to CC.

You lose a little dps on trash using mirror light offensively but you gain more support in the boss fights, which matters most.

I am currently leveling my witchcraft (42), will definitely switch to this when done for GHA.

Have not used Conversion Shield, you think it's worth losing tele or speed boost?