For the mig, they easy way to kill things is immelmann's. It had such a high climb rate that nothing can follow. If a saber (even f5e) follows you, after a few immelmann's they will lose a lot of energy and be easy prey. If they dont follow you, just try and slot in on them.
Edit- never follow a saber if they go into a scissors, they will out roll you and you will die. Also if they dive away, dont bother just keep altitude.