Add one of the following hacks at a loadout terminal to get the corresponding bonus:

Exploding Enemies: Gives a 75 percent XP boost, and every time an enemy dies, they explode harming everything around them. It is recommended if you primarily use ranged attacks.

More Ammo: Enemies drop more ammunition, you have less health, and gain a 75 percent XP boost. It is recommended if you can frequently take cover.

More Health: Gives a 125 percent XP boost, and enemies drop more health than ammo. It is recommended if your weapon has decent ammunition capacity.

No Shield Regen: Gives a 300 percent XP boost, but your shield does not regenerate unless you defeat an enemy. It is recommended if you can aim well and take cover frequently.

Tough Guys: Gives a 200 percent XP boost, but enemies inflict more damage and have less health. It is recommended if you can avoid damage or take cover until your shield regenerates.