If your opponent does not have a wake up attack i found that 


knocks them back perfectly into Mid Ground slam range. If they do not do a wake up attack or delay their getting up they should get hit by Ground Pound as they get up. This will allow some juggling or a simple air grab will add 20% mixed with the pound itself.
You can mix this up (after you have them thinking you will always go for a mid pound) by tossing a projectile on their wake up as well for characters like Cage whose wake up attack will cause them to eat the projectile.
The only characters this does not work on at all is teleport characters but you can trick them into thinking you are going to follow up with a ground slam only to block and punish their teleport.
Jax is seeming like a character who needs to play mind games to beat people.




You can mix this up (after you have them thinking you will always go for a mid pound) by tossing a projectile on their wake up as well for characters like Cage whose wake up attack will cause them to eat the projectile.
The only characters this does not work on at all is teleport characters but you can trick them into thinking you are going to follow up with a ground slam only to block and punish their teleport.
Jax is seeming like a character who needs to play mind games to beat people.