After further inspection it isn't a CD at all jsut a buff to balance to dps with. Archangel has a 18 sec period and 15 CD so get 5 Evangalism stack and pop AA every 15-18 secs.

Still intresting addition to the playstyle, it seems to be replacing shadowweaving though, lets hope it is nondispelable.

On a bright point I remember earlier beta builds had AA with to awesome wings, it would be awesome for this to be up all the time you have the buff. So if anyone has Sceenshots or videos of this in shadowform I would love to see it.