Wait just a minute. To get my facts straight, ZSS' N-air clanks with everything in the game. That includes MK's moveset? Nice. I guess clanking wouldn't hurt, and a swift U-air could turn it in ZSS' favor.
Secondly, flip jumping over Marth as he F-airs could help me get on the other side, yes? Although then he could just as easily B-air. From what I read on the guide (which is truly awesome, SFP, thanks!) the kick following the flip jump has transcending priority (and a disjointed hitbox?) and can, therefore, beat Marth's B-air? Sorry to ask again, but can the flip jump's kick also beat his F-air? Spacing it properly would be a pain, though.
Edit: Link's SH B-air is a great OoS option. ZSS' SH is too high to approach with aerials effectively. Am I doing it wrong?