This is a guide to explain a good old (with some modifications of course) build for manamune Kha'Zix

Kha is a very team reliable mid laner.Be carefull when u pick him V.S. spesific opponents other
matches will propably go well

Pros:Good Sustain with evolved W
Hight assassination potential
Doesen't have many hard counters
Easy to learn

Cons:Can be snowballed hard
Needs early kills(Don't Steal kills)
Hard to master the build and the champ
Is a bug (obviusly)

At early levels Q is a great ability to get CS at mid

V.S. Ranged:W is also a good way of farming if u get poked
V.S Meele:Auto-attacks are your best friend,unless u get poked by champs like zed or xerath then Q and W iis also a way

Here are some combos
1st:Use E and mid air Q
2nd:Use W and a fast action E to reach the healing explosion
3rd:Auto and an instand Q

Don't be rushy.You need to understand the hiden gold of this build first then u can try this

Lastly Team Work is your best friend.You will need some kills early (2-4) to get a good headstart in the game

Early:Farm Some kills and that is aboute it.Roaming is only a good option if u evolve E first
Mid:Keep Farming until level 16 Is a good way to get stong for the rest of the game
Late:There are two ways to play
1st:Try to Deffend the Damage Dealer of the team
2nd:Kill the opponents Back line using your R