hey is it possible to force the raiders to bodyguard?

they lag the hell out in 50+ groups.
my 50+ colony doesn't lag, killing all but one of my colonists and every plant/animal on map did nothing.
the only thing that worked was getting them to steal stuff and run. using dubs performance analyser i noticed the biggest change was the job search. after they all had a steal stuff job the lag was gone.
so is it possible to edit the raiders to bodyguard a boss so they have a job?