The other effect is good. Only half the item is useless, its still good on him.

No items explanatory, triforce gives mana so its useless abit.

A few problems:
First it is VERY short and has almost no detail.
Lacking many sections: runes, masteries, items, summoner spells ect.
Pros/cons sections is bad. Your opinion is not a pro. Lots of champs can jump out of bushes: kha, jax ect. Feeding the other team is not related to this guide in any way as it is not a problem with rengar or this build, it is LoL.
4 ending items?
No boots?
Why get frozen mallet and trinity force because the icy passive is lost from one of them.
It is spelt kha'zix.
Add a different set of items for jungle and don't just say you did it to save time, that just makes you sound lazy and you don't care about the guide.

Try and fix these and add a lot more detail. This guide is not complete and should not be published.

(Didn't downvote because I don't like it when people do that without a very good reason)

An extremely short guide and only one cheatsheet, which is bad, considering that this is a top and jungle guide.