User blog comment:YoshinatorZ/Rengar Talk Page/@comment-5194571-20120810193444

I'm surprised nobody has mentioned this yet. If your allies ward the two brushes at top/bot and you tp in, that could be really scary. A normal lane gank could also be terrifying if you get the chance. I've only played one game with him so far because he's constantly instalocked before I get the chance to click. That time I played him we already had a jungler, so...

As for jungling, I would personally take TP and Smite. At the start, I'd ask my team top/bot to ward the nearest brush to their turret if they're getting pushed back early. I'd start red, then do wraiths, wolves, golems. If I still have the health, I'd donate blue to mid. After buying I'd TP gank if possible. Otherwise I'd just go for normal ganks.

For build, I like Youmuu's. It stacks well with his special item, though I would prefer not to get that. Seems a lot like those snowball items, though not as risky. Still a bit unviable imo. If I'm going 1v1 a lot, Guinsoo's would be really nice. It worked for me. Wit's End also works if you want a bit of MR while not sacraficing damage.

His passive can also be used as a good escape mechanism if enemy minions/jungle creeps are nearby. Especially if used in combination with Flash to set up some strong jukes. Sadly, I was against a Katarina that match. We just endlessly kited eachother all the time and never really killed eachother.

Which moves me on to his weaknesses. He's easily kited if he can't use his passive or his ult. Bad/new Rangar players will also rely on his special item. Even if doing badly, they won't sell it because they won't think to do it. I made this mistake once I got focused down a lot. He also won't do well in long fights. Unless you have lifesteal, you'll want to burst your target down really quickly. I didn't bother with lifesteal that match. I was against a lot of AP and only one tank. I kinda regret it now that I lost. Just like any other champion that's not remarkably tanky, he's squishy without survivability.

Well, that's just about all I got from that one game with him. Pick my reasoning apart if you want. I'll enjoy the mental duel. :P