I don't think I've ever been killed by arrow and LRM NARC/TAG attacks in anything lighter than a bushwhacker..
If you're walking alone in a field with an Atlas or Mauler you deserve to die from an attack like that.
Slow mechs beware... they should melt into their teammates and be at the center of an attack, not run off by themselves.
I love when there is missile spam cause it means a row of defenseless tanks sitting obviously on a hill.
Get in a light mech (All laser Uller comes to mind) or a fast up close medium mech or even a harasser and close to range, you can chew them up easy. And about the BA's... here's a simple solution, ignore them and move on. Less than 3 Ba's should be no threat to a light mech. Don't misunderstand me, they can chew its back armor up, but they have to catch you first. A BA at normal gravity cannot catch a light mech or harasser after their initial jumpjets run out, you're simply too fast if you're retreating. Once the BA breaks off, go back and get another. Or kill the BA, very rarely I've had lag prevent me killing a BA with light mech weapons.