Could this be implemented? Say you've got Blue wing, a wing of four in three waves - you can't sexp anything relating to any ship past Blue 5 - therefore if you want Blue 7 to send a message, or the last survivor of the wave (ie. Blue 9, 10, 11 or 12) you're screwed.
Also, could it be possible to reference waves in a similar way we reference wings? Say you want wave 1 to concentrate on disabling a ship, wave two to concentrate on disarming and wave three on taking out the sensors - this can't be done, you need three separate wings. Perhaps it could be altered so that you could use "add data" to insert a wave number when you're sexping something related to wings?