Broken. That's what it is, LOL.
Apparently they seem to have a built in Holy Path skill too.
Yes it's totally broken and you know it before even playing 1.5.2, like vindex said the target needs to die right after or it will have a 30s CD and the stun is only 1s long.
The built in "holy path" looks just as fast as wings of grace speed buff LOL, let's wait for maxed skills before judging