Sorry if this was pointed out or asked already but is this skill broken?

Broken as in, not working as intended.

Did the skill in 3 situation, frontal, flank and behind.

all in which the debuff is still applied and the same amount of damage.

Now im not sure if its actually getting its 260 combo potency from flank or not because all the damage came out roughly the same (about 540-560 at i106 with i110 sold weap). but regardless of what position you are, your still gonna get off that slash resist debuff.