This a Rengar build me and my friends thought of hope you enjoy it, with it your rengar will destroy everything in 3v3's

i grabbed armor pen Marks, Attack damage glyphs and quintessences, and attack speed seals.

For masteries I focus on damage output period then grab armor and magic resist.

For summoner spells i recommend flash (or ghost) for defensive escape quicker you can get to the bush the better, then you can get Ignite or Heal for picking up early game kills or some health regain.

All in all this is a exceptional build and with it laning top on Twisted treeline you can crush things and do immense amounts of damage.