Plus, who knows what else they'll release between now, then, and Jirach's eventual rotation?
Examples from the past, that don't work because either they have already rotated or will rotate by the time Escape Board does, at least give us some ideas for what to look for among newer cards.
Jirachi (SM - Team Up 99/181; SM - Black Star Promos SM161) is something of an update to Jirachi (EX - Deoxys 9/107). Ninja Boy is the Supporter version of the Item card Swoop! Teleporter. The old Jirachi was as or perhaps even more heavily (and successfully) played back then as the modern one is now. Even though Swoop! Teleporter couldn't snag a Basic Pokémon-ex (the equivalent of our vanilla Pokémon-GX), you just grabbed a Basic that could evolve and - provided it wasn't Jirachi's first turn in play - then immediately evolved Jirachi after using its Poké-Power (old school version of Abilities). Not likely to be repeated again anytime soon, but a good example of a less obvious combo.
Air Balloon means a deck can now run Dawn Wings Necrozma-GX and use the two to fake a Switch once per turn, though at the cost of your manual retreat for the turn. Which is nothing new. Keldeo-EX did it with Float Stone, and we've had some others with almost the same kind of effect. So I won't be surprised if we get a Pokémon V version sooner or later. If we do, then you just promote Jirachi anytime something of yours is KO'd, or you already had to use a card like Mallow & Lana, etc. Then use the Ability to promote whatever has Air Balloon, and finally use your manual retreat to bring up something else.