Harro im Azn and my english is bad on this srry. On this build since all of the nerf's on jax its much better to go ad now with some attackspeed. As you know Jax is not that good early game but owns at late game with the over 3k of hp and 300 ad.

I simply go with ad carry runes. 9 armor penetration marks, 9 dodge seals,9 attk speed gylphs and i either go 3 dodge Quintessences or you can go 3 attk speed Quintessences.

I go with 21/9/0 I dont go with the Archaic knowledge because like i said in this build im pure ad and no ap items and getting dodge on defense masteries i put 3 points in hardiness because wen you activate your ult it gives you some mr.

I get2 dorans blade because for the extra 200hp with 20 attk and 6%lifesteal ninja tabi, guinsoo rageblade, and hextech gunblade is a must item for jax. Ninja tabi gives you dodge, guinsoo stack with your ult passive which gives you a lot of attk speed and hextech for the slow wen you activated it and for the lifesteal. I get trinity force because of the sheen prox, slow on phage, and for the attk speed on zeal. atma's because you will have over 3k of hp (i think) and it gives you dmg based on the % of your hp and for my last item I get for defensive banshee.

Wen you use your skills you use q first and then after you land u use w thats it you do it k.