Bounty hunter Mastery seems kinda Bad Maybe I'm completely wrong
I haven't tried it but every time i read it i cringe for champions without CC (the other option you rely on your teamates).
I don't know what people are using or anything but i feel like 1% per champion killed just isn't even close to 2.5% increased to immobilized.
For starters it' s useless in lane. Unless you happen to 1v2.
Secondly I'd rather have 2.5% increased even if i had no cc just because of team fights and laning.
Finally I feel as if similar to Hearthstone Bounty Hunter is a "win harder" mastery. If you killed 3 people on the enemy team, It finally matches up as more valuable. But by that time you either won the team fight or are close to dying.
I don't know. Just seems to me like it's a bad alternative for ccless non ad champs (even ad)