My first build, so I hope you enjoy. This is just a build/guide that I made up while using Jax. I think it's pretty good considering that he does good damage and is kind of a tank at the same time. There is a significant amount of ability power. I hope you guys use this guide and have fun with it. I just kind of picked random masteries, so don't blame me if you don't like them.

The runes that I chose balanced Jax between AD and AP I supposed this makes Jax a really good hybrid.

If you see the numbers of each type of masteries they are balanced. Jax has increased attack damage, attack speed, armor, magic resistance, movement speed, and etc. This keeps Jax under control like how the government stays balanced using the checks and balances system. Anyway let's forget about politics and continue.

I think Berserker's Greaves is necessary and essential since all the other items don't give attack speed except for Guinsoo's Rageblade's unique passive and Malady. I think the Rageblade is necessary since it can combine with Jax's passive and let him gain a tremendous amount of attack speed and ability power. Hextech Gunblade is good because when you use Leap Strike and have spell vamp, then you can gain health even with basic attacks or an ability. Warmog's Armor is good to have because if it weren't for it then I would die in a lot of team fights. Malady is a good item because it gives attack speed (which Jax needs) and ability power. Trinity Force is of course needed because you couldn't be a hybrid without it.

I personally just like the skill sequence because it worked out for me. If you don't like it then you can change it. Remember, you don't have to follow this.

Heal is necessary, of course, for healing. Flash is a good spell because if you need to escape, then you can use it. It can also be used to get closer for the finishing blow of a champion.

Overall I think this is a great build. If you think this needs adjustments, please tell me and I'll try it out. Thanks for using it!

Pros: Jax can counter-gank if there's two people.
He's good for farming, because if champions decide to get close, you can use a combo of W and Q to attack them and push them back.
Cons: This is only good if you don't manage to feed those in your lanes.
Not a good champion against 3 v 1 fights, also known as a gank.