[Snake]

'Glancing Blows' is stacking with normal hit checks, wether the attack has it's hit check on it's own or not. A successful 'Glancing Blows' proc also denies the one who dodged to receive certain on-dodge bonuses, like Flottement or Quick Rise.

My suggestion to fix this whole deal about it is to make 'Glancing Blows' not proc on skills or attacks (basic attacks, per se) that already uses this format of hit-check.