Taking combat trim off in a fight and pretending you can use trim to out roll your enemy is laughable. Combat trim adjust your trim to the max potential and then re-stabalizes your plane. Turning it off leaves your plane cockeyed at certain positions in the fight which can throw you off when performing maneuvers.
This thread is about "escaping" a rolling scissors. There are only a few certainties that you could work your way out of. Those assumptions have been entertained. Either you figure out a way to use E to perform a split S to spiral climb and hope you pull off the rope, normally In faster less turnable planes. Or you break the roll into a chase and attempt to force an overshoot. Managing E, throttle, and flaps with timing of the rolls, compared to the enemies E state is what takes practice and experience to break the roll before you lose too much E.