True Strike: 150potency 5% increased chance to crit.
This skill isn't much different from twin snakes. There isn't much incentive to use it.

Arm of the Destroyer: 50potency 130TP 1second silence
The utility is cool versus magic users but the silence duration is pathetic.
The TP consumption is too high to warrant continuous use.

One Inch Punch: 80potency Removes a Beneficial Status
I don't know of any situation where this skill is useful.

These three monk skills don't have much relevance in combat from what I've noticed. I don't know how to fix them but they need some looking at.