Just get tired of seeing banish armor miss so frequently. It's got a 10 minute timer and it's really the only thing that defines the KNoC class besides our summonables (let's not go there).
It says the ability is based on summoning, eventhough I have taken conj to100 it still misses quite frequently. I have a snazzy little emote that goes off when I use it, but it misses so much I'm considering making a separate hotkeythat says "Save your attacks, banishmissed again [:'(]".