Learn to control your BG Mercs and not make them fire at everything instead of being stupid and setting them to destroy everything in sight that way you won't get killed when you're loading like a fool.
It usually all happens in a matter of 5 seconds. I start next to a group of mantis, 2 of my guys 1hit kill 2 of my other guys or i get 2 bursts and die. I've went through 11 of these guys in a matter of 2 hours. They will break your bank FAST. There is no controlling them if you have no time to set them up or give commands.
Also arent there commands which you can set to make it so they won't shoot until you or they are attacked?
If it didn't work the first 2 times why would you keep trying and doing the same thing.Also arent there commands which you can set to make it so they won't shoot until you or they are attacked?