I wouldn't get max Screw Punch. Max Energy Blast with the new skill updates is MUCH more useful in terms of damage. At those higher levels, you'll only be using Screw Punch as a mobbing mechanism anyways. Energy Blast is better.
Edit : Also, your fist job build is atrocious! You're going to NEED Flash Fist for training as a second job Striker. It's much more beneficial to a Striker than an Infighter due to the fact that Strikers don't get as many skills as an Infighter does. I say you should get max Quick Motion, Max SommerSault Kick, Max Straight and the rest of your points into your Sprite.
Edit#2: Transform doesn't give a STR boost, so cut that out. lol
Edit : Also, your fist job build is atrocious! You're going to NEED Flash Fist for training as a second job Striker. It's much more beneficial to a Striker than an Infighter due to the fact that Strikers don't get as many skills as an Infighter does. I say you should get max Quick Motion, Max SommerSault Kick, Max Straight and the rest of your points into your Sprite.
Edit#2: Transform doesn't give a STR boost, so cut that out. lol