Note that with +0 skill, glancing blows were doing about 2/3 normal damage to Onyxia, whereas with +10, there was no damage reduction at all. Lvl 63 Mobs have -30% damage against level 60 players and glance 40% of the time.
Some research indicating that the current Glancing Blow formula is incorrect has been found.Ģnd source which confirms the same table:
