When trying to kill the bots I've figured out that the best way to take them down is to get behind cover, apply the reflex enhansment, run out and shoot at the until it wears out, get back behind cover, and repeat.

In between battles weather on the run or talking to teammates, reload and refresh. So that during the battle your not reloading after one shot or two. Also keep a good eye out for extra boosters, medikits, armor and weapons.

When you get into well lit areas you don't need to have your torch on. Turn it off and let it charge back up.

To keep your ammo up don't shoot them in the arm or head, do head shoots to kill them faster. Then collect all the bad guys weapons and ammo and you will never run out of bullets!