In season three and now four Jax lost a lot of the sustain he had season two and became the most difficult things for him .
But not much.
The weather of the beginning of Jax are just above and you must be wondering .. Why so much potion ?
Answer : For the same reasons , Sustain .


You will not play very offensive to handle pick six level , where Jax gets stronger
When this happens you will give us two hits minions with Q and jump on the enemy activate W and hence you will take damage from the W + Passive Skill Ultimate + Sheen (if you're with it )


If you are strong ( 6 / 0 to 12 minutes ) lets you pull lane and the minions under the tower of the enemy and try to gank mid .

The Secret to play well with Jax is knowing when to use E.
If you jump on the enemy with Q and E already connected you lose the damage of the skill that is little, but it is considerable , and also dodge the hits of the enemy .
You are leaping at the enemy with E on before , if it is to gank or if you are sure that the guy will die.

Pros: Jax he has too much damage is very tank, has a late game amazing, has a CC, is excellent in team fight, and you can easily carry the team.

Cons: O Jax toma counter muito fácil para champions como renekton(na trocação) e Teemo(no farm) entres outros.
No Early Game o Jax tem perigo de tomar counter em tudo.