First of all i like to thank you guys for watching this guide.
I'm new to Mobafire , and this is my first guide!
When i first start playing this game , i always got killed by a purple ''dude'' with a lantern-mace.
I thaught by myself : I want that champion!
I didn't knew how to play him , so i've did some research and all the guides and builds that i found .. just dont fit me.
So i wanted to make my own guide ; and here it is.
Please enjoy !

The runes are pretty straight-forward.
The Greater Marks of Alacrity has a great synergy with his Ultimate Passive ;(Jax's basic attacks increase his attack speed for 2.5 seconds (max 10 stacks). Every 3rd consecutive attack deals bonus magic damage.) to just get that 3rd attack earlier.

Greater Seals of Evasion are for the dodge rate.

I took Greater Glyph of Potency for the extra AP ( The more AP the more DMG with Leap strike and Empower).

And Greater Quintessence of Evasion for again the dodge rate.

Im going 9 / 21 / 0 because of the more dodge and movement speed from the Defense Tree.
The 9 in offense are for the Spell Pen and the cooldown reduction, also the exhaust boost for longer duration and the magic resist and armor reduction.
People always put in 21 in the offense because they think Jax is an offensive character, but he's the best at 1v1 and 21 in defense boost your 1v1 duels.

Doran's ring has a nice boost for getting the First Blood ( which you really need ).

Ninja Tabi for the armor & dodge , and of course the movement speed .

I took Sheen as 3rd item because of the early game burst damage you get.

Blasting wand for the AP and for the guinsoo's.

Guinsoo's Rageblade is SO awesome because of the great synergy with his ultimate.

Giant's belt for his survivability and for the Scepter.

Rylai's Crystal Scepter fits so great with Jax his Leap Strike, you hit him with Leap Strike and they wanna run because your Damage is so epic but oh no your opponent is slowed and you now can easily finish him off!

Hextech Revolver for the spell vamp and hextech Gunblade.

Hextech Gunblade is very good for Jax , the AD / AP will boost his damage and Spell Vamp / Lifesteal will greatly improve his survivability / 1v1 duels.

Lichbane for the Epic Passive (With it, a champion's next physical attack after using an ability passively deals 100% of Ability Power as physical damage). You gotta love this item , it also gives AP / Mana / Movement speed AND Magic Resist.

Rabadon's Deathcap for the AP and his unique passive : Increases Ability Power by 30%.

Exhaust : For the runaways and for the 1v1 confrontations.

Flash : For chasing or escaping the enemy, very good tool for Jax.

Others.

Ignite : It's a skill that deals DOT at the enemy ; good for killing people that runaway with low HP.

Cleanse : This spell is good for when they cast all CC on you and make them dissapear.

Ghost : Nice for chasing down enemies.

Off Limits.

The one's that i didn't called.

Boost with empower , then leap strike.
You will also get an auto-attack after the empower because that resets the timer so sheen ( lichbane ) is extremely effective.
This combo you can do every 3.5 - 4 seconds .
If you are in team fights always focus on the squishiest because you can kill that one easily with your Damage go for the buffs from Lizard and take on dragon if you want to.