The quickest way for me to get aggro: reload my gun.

I have a level 30 Engie, with a higher QL aggression trimmer and a red con bot, and I'm using a grenade launcher. The mobs don't seem to care when they parry my grenades, they sometimes care about my damage, and there are times I can do a 300+ crit hit and not get aggro from my bot. But heaven help me if I accidentally let the game manage the reloading of the gun. The moment I see the "reloading" message appear, mobs go into red alert status and make a beeline to me.

Perhaps Enforcers should be issued these grenade launchers and then reload them to pull aggro. :)

Something is seriously hosed with the aggro on reload.