Rengar is OP in Twisted Treeline and is very fun to play.

i go all attack runes, but some people use magic resist and armor.

i start off with boots for some speed and dorans at the start of the game which seems the most efficient way to get a kill early game. then i go swift boots for speed and phage because tankiness is very OP in TT. then build frozen heart to zekes, then to pilager for more damage. but the game is usually over by then.

I max out Bolas first because at level 5 because the damage and 70% slow is very OP plus the fact there is no mana cost. i usually use bolas a lot to help me get kills and my teammates also to run from enemies. with swift boots and bolas you can easily out-run singed and the fastest champions. i usually only find my self using my ult to escape battles, but it is also very good for ganks.

Thank you for reading my guide, took me about 10 mins. if this guide helped you please leave a comment or if you have any advice.