simply trade all assasin's avoid assault from light to hefty and evade assaults of kensei and griffin and other people who can simply manhandle that from substantial to light, it would be acceptable. Like this poor orochi that I obliterated today,once missjudges the avoid and goes for evade assault and as a rebuff he lost like 25-35 HP (large measure of orochi's wellbeing bar). While kenseis that can mishandle the evade assault will get rebuffed for 12-15HP (not evel quarter of his wellbeing bar)...and with his stam accomplishment he can do it for eternity.
so to make professional killers diverse at something separated from being awful at protection and wellbeing, you could normalize evade assaults for them to just heavies, and the remainder of the list to lights, with the exception of possibly for zhanhu since he is an extraordinary case, supossedly a "avoid subject matter expert".
basic fix that can end appalling evade assault spam from the bare monkey and the samurai ruler of cheddar, while professional killers persuade something to be less awful.