You'll learn when they really need help, It really isnt until the second UR ALLY needs HALP that you may need to look into them. The first help notice is something to be ignored.
Plus you cant save everyone. As long as they arent essential to the objective, you can probably handle things on your own. There's a leadership skill that can be gained that boost their durability. Still, the faster you kill as you level up, the less problem you will have managing threats since you'll move and kill stupid fast.