they look very fun and better than old masteries
battering blows is too high up, creates whacky exclusivity to assassins and adc's, unfair for fighters. also the mastery is a bit too strong in general. 7% is really too much. i'm thinking 4-5% and battering blows and piercing thoughts should be swapped with vampirism/natural talent.
glad veterans scars is exclusive to tanks now, unless damage roles want to trade off a decent portion of damage for it.