Runic Affinity Change?
with the loss of 4 out of the 6 main buffs in the jungle...this mastery has be come little to no effect compared to Assassin or biscuits. And with the new changes to red and blue in patch 6.24...blue and red are gonna have a munch less impact all round anyway lowering your damage output significantly. I think it should now give you what was lost on blue and red in patch 6.24...just on a lighter scale... a tick of red procing every other-4 auto attacks and blue giving 5% increased AP