As you know Monk's robe is useless right now. Think about old ages... In every army there are monks in charge. Think about the monk who wears Monk's Robe will give a circle like unit and formation. And the warriors who die inside it will lose %50 skill lose or alignment.(you decide the percentage.) But you need monk's robe for sure. Which makes the monk defenceless bcs you cant wear vital armors with it.
other idea
If you hit 90 piety skill you will have confession ability with a big cooldown. You can give 1 alignment with a small percentage of chance like 0.01 . And you cant use this skill with the same person. And you need monk's outfit for that.
What do you think guys?