Not Updated For Current Season
The masteries shown here are not yet updated for the current season, the guide author needs to set up the new masteries. As such, they will be different than the masteries you see in-game.
Jax Is a amazing character if you know his limits. Not much practice is required to completely decimate the other team. Jax is a monster early game so don't be intimidated. Do not go mid as Jax though. I know I said he was a monster early game but, he can't hold up in it so don't try.
For Jax I normally use the W-Q-E combo. If I'm harassing W-Q is just fine. If I'm going for a kill, W-Q-R-E is the way to go. If I'm running to help someone get away or get away myself E is your absolute best friend.
Jax - Rules
6 Jax Rules to Always Follow
1. Spam Empower its very inexpensive in Mana
2. Always go in from the side, unless other circumstances are present
3. If your fighting a enemy champion Counter-Strike is your best friend
4. Never over-extend; you're too squishy
5. You are not a tank, but play a little aggressive
6. Yi is not better than you >:| !!!