When u have your ult maxed you can just ult to get ferocity for a fight since the cooldown at max rank is about 44 seconds. At lower levels before i fight i try to have max ferocity and your q as a low cooldown at all ranks. The reason i don't have and cdr runes is because i like the survivability more of the magic resist and armor runes.

I don't see how you get by without CDR. Champ uses no mana and gets bonuses after casting 5 abilities. I do agree on having 9 attack quints, I love doing this when im in the jungle, no one notices.

Fancyz i will try out the doran's blades and the making battle roar 2nd again also sometimes i get Sheen before Zeal if i want to do more burst.

Bigger Issues

// Overall, this guide is very well written. I would prefer to go for Sheen after Phage, because Rengar has that super bursty Savagery[Q], imagine the damage that would do. Another thing I've noticed is that you chose to add Battle Roar last, I'm not sure why but the armor and magic resistance it adds is very good for you in 1v1 top lane, it just gives you like the ultimate early and core game advantage over your opponent. In my opinion, Rengar would go better with this skills sequence: QWQEQRQWQWRWWEEREE.

// As I saw at the end of items, you said that Doran's Blade is not very good for Rengar, but during my gameplay with Rengar, many times have I seen first blood, Rengar vs Rengar, been taken by the Doran's Blade player. Please reconsider this information.

Smaller Issues

• You gave 9 quint rune in the jungling.
  
  
  No vote for me now, I hope you'll likely accept my opinion! Cheers, game on!

good guide !