Also put more explanation into your masteries choices.. it could get this guide more upvotes

Nice, looks solid. +1.

Also look up how to make a more aesthetic looking guide please.

Walls of text too strong

All valid points but i do have those coming.

I'm just going to say that this needs a bit more pictures... Because the guide is good and all but it could be better if it wasn't just a wall of texts after more walls of texts. Some pictures, maybe you can show the map and what Rengar's route is, (because I'm pretty sure you would lose a lot of people's attention with that text wall.) etc etc. And you could also make some other sections like situational items, and which summoner spells are good and which aren't and maybe you can make a section for what to do against other junglers? Like which junglers Rengar might have trouble with, which he has an advantage over, and those good stuff.

Just giving some ideas, so... yeah.
I don't know if you already have this in store or not, so you can ignore this if you're planning on this.

Honestly The wriggles is an item that you could fit in if you wanted to make it optional. And remember its just a guide not a Follow it exactly. The Heart of Gold I would buy it but once again you would lose some value because you aren't building it into anything. And Rengar actually has a surprisingly low AS so I keep the Berserker Greaves throughout the game to compensate. And its not really a bruiser build. Rengar doesn't play like a bruiser hes too bursty. It's more of a get in get massive damage off and still live in the process. So that's my thought process but its still very early after Rengars release. Thank you for the Input ^_^

Wouldn't a Wriggle's fit well into in his early game? I also think a Heart of Gold is good if you are not getting very successful ganks early game to give you some extra income into mid game. Of course if you are getting successful ganks, I would suggest the bone necklace then just go with a normal bruiser build, and I'd trade the beserker's greaves for merc trades going into late game if a bruiser is what your aiming for, especially since you already have AS runes.

Honestly you dont need Cloth Armor if you take the armor runes and i Go Q W Q only because the Q's cooldown is low enough that you can get ferocity stacks in time to heal and gank. So its not necessary and the E is not that affective on minions. And Du bist deutsch? Cool :D

i would start with cloth armor and 5 health potion
first i would skill Q>W>E
if you have a abillity more you get foricity faster and can heal with W

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btw im german >.<