Rengar on Twisted Treeline

So yeah I'm a big fan of Rengar, been playing him since his release back in S2, and I've been OTP him ever since. Lately I've started to play 3v3 a lot, and of course I bring my trusty kitten over there, and I am having a ton of fun as I have realised that you can also play Rengar on 3v3 efficiently. The only thing that bothers me, is that I saw that my passive doesn't reach full potential on this map. Allow me to show what I mean.

Bonetooth 1 stack: 1 AD + 1% bonus AD increase

Bonetooth 2 stacks: 3 AD + 3% bonus AD incrase

Bonetooth 3 stacks: 7 AD + 7% bonus AD increase ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ TT champion limit Bonetooth 4 stacks: 13 AD + 13% bonus AD increase

Bonetooth 5 stacks: 20 AD + 20% bonus AD increase

When playing Rengar on 3v3, you don't have 5 enemies that you can gain a stack on, and thus you will only receive 7 AD and 7% bonus AD for completing the hunt. I'd say it's a rather huge power reduction to lose 2/3 of ones passive, just because you are changing map.