That’s actually not right. Forecasted units still “arrive” when they remove their last time rune, so they trigger Quince’s maxband.
@Night_talk the basic idea is to use Quince’s ability to make copies of your Omegacrons to land an overwhelming finishing blow. Here’s an example of the combo going off in an actual game. Jadiel ends up playing 5 Omegacrons on one turn (2 “real”, 3 illusions), which is easily enough damage to clear the patrol zone and take the opposing base from 20 HP to 0 in one shot.
Note however that the combo requires quite a bit of setup (Jadiel didn’t pull it off until turn 7), so it can definitely be disrupted.