The custap berry onix is actually quite a big brain move (i may also borrow this idea), but im confused with how u plan on sweeping with exegutor. Like dosen't it have base 45 speed, i think almost everything on her team will be able to out-speed, but i am just guessing. My main strat, similar to that with your feraligator, was to just get rid of dragon den. I dont normally like doing that becuase it feels cheap but man, the boost she gets from that field is pretty nutty so i might try a few times with her normally but otherwise im using prankster whimicott setting up misty and sweeping with 5 other fairies.