Does Holy Avenger apply to communion slaves?

[llamabeast]

You could communion a whole load of vamps, have the communion master cast Holy Avenger and then leave, and they'd do heaps more damage and still be immortal so it wouldn't matter when they died.

It'd be a nice complement to doing something similar with Phoenix Pyre.

[JimMorrison]

Blood Vengeance, Holy Avenger, Fire Shield, Astral Shield, Phoenix Pyre..... Am I missing anything nasty?

Oh right, Soul Vortex.