The open hand monk can do some... silly things.
But I don't think much tops beating people up with a longbow.
With 5 levels in open hand monk, and 9 levels in evangelist of erastil, things get really silly.
Due to the Devine boon of erastil, you get your wisdom added to damage and to-hit, so long as you use a longbow against a target within 30 feet.
And thanks to open hand monk, it's a two handed melee weapon. So you get str and wisdom to hit and damage.
Not the absolute best out there, but I find it really funny that this works.
Oh, and as always, surprise weapon for a +2 to hit.