The Gauss build I've been using.

Well-rounded for all his abilities.

Enough efficiency & duration where you can keep his 2 & 4 up, run to build meter & stun enemies, and use your 3 to stun enemies for defensive missions.

• While Redline is active, switching between Thermal Sunder applying Heat or Cold will remove armor equal to your battery % from enemies as well

If you want to put Forma into this build, you could replace [Flow] with [Primed Flow] & add [Rush] for an Exilus mod.