Just something I put together to give GMs a new Imperial threat to put in front of their players, especially those who feel that stormtroopers aren't much of a threat anymore.

http://jedimorningfire.blogspot.com/2015/12/threat-assessment-imperial-purge.html

Oh but the good ole Stormies are still a threat.

Just use enough of them in groups of 6. I tend to use about 120 to make my players run away in fear.