Ive known this for quite awhile and never thought of it as an exploit but I guess it can pass as one.
To start the fight off with a couple extra Combo Points you need to Sap,
Cheapshot and turn away before you do any damage and restealth.
Cheapshot does not remove sap and places 2 combo points on the target. If your quick you can restealth and start the fight off with 2 extra Combo Points.