It’s usually best to start with a Trickster-style infiltration using the Quadcopter to oversee an area, tag enemies, and perhaps take as many out as you can without raising the alarm. Continue this until mission completion or until you wish to switch styles. Then use Ghost-style infiltration, strangling foes until the entire area is devoid of enemies, except those who may arrive if you step into a motion detector or through a laser fence.
If at any point during the previous two infiltration scenarios the enemy discovers you and starts shooting, fight back with Aggressor-style tactics, then either follow up with mayhem until everyone except you is dead or you seek cover, vanish (escape), and continue with a more silent infiltration.