the point is that you shouldn't execute them...
u should just make sure they are all on the ground/incapacitated,...So they do not respawn, spot the medics and put them down first
this way you will get sometime to take position for when they come, as well you will have gained some precious seconds to hack
This^^ You have to think out your game play a lot more in this game to have success. There's more strategy to who you should kill first and how you do it, even the way you should obtain an objective. I believe the AI diffinitely needs some work though, through the whole game.