Also starting with ZZ and then messing up EO on your last pair is a pointless exercise. Having edges oriented is really only important for the end of your solve, so doing it at the beginning and then destroying it right when you need it is an awful idea. And inserting pure flips/twists generally turns out poorly.
Well I did not seriously consider messing up EO in a ZZ solve.
But decided to post this because I stumbled over the last pair and in fiddling around found this funny "end". I didn't kow if there could be an "easy" fix.
Something like a comm or cycle that flips the cubies and could be inserted somewhere during the solve.