With poor AI sneak is OP especially if you can sneak in and of combat.plus add cloak.
High wits.kill an enemy. Go invis.
Move out of sight cone.
Next round sneak then wait until cloak is ready or use potions
Repeat.
If the game allows attack then hide (not at risk) then repeat you win every combat.
Gets boring.
Plus if you can leave then return to combat you can get infinite turns...
So can be hard to balance
