In MM7, GM rank in Unarmed grants chance to evade attacks. At least, according to the tooltp.
However, this seems to work only for mobs up to certain level. In Late Game, it doesn't work at all.

Example:
Goblins - Works often
Medusas - Works often
Behemoths - Never
Minotaurs - Never
Dragons, Titans, Demons etc - Never

I tested this with and without the Grayface patch. Does anyone know whats up with that?

its because it only works against physical attacks (might be melee only melee as well), for example against master of the sword it works which is higher level than minotaurs and mino lords. dragons and titans only attack with magic idk why it wouldn't work against behemoths tho

Thanks for the reply.
Titans do a lot of melee attacks. At least their animation shows that.
Similarly, Minotaurs perform a lot of melee strikes.

Evasion is pretty cool but if it doesn't scale into late game, then what can I say - its pretty disappointing. I don't need evasion to survive goblins.

In my experience it only works against ranged physical attacks - hence, goblins and medusas' arrows.