Since 1.18a, Simian Thrash is considerably stronger than Victimize II given the same circumstances. Unless Chaos Thrust at 3k TP with mob <20% HP hits harder than that, Simian Thrash has become the strongest WS in the game. It's justified due to the evade requirement.

Only thing I feel needs to change with it is to remove the little purple ball and leave only the cherry blossom effect. Also speed up the hits leading to the jump.