Ready Action to reapply a spell?

Let's say the party is fighting a boss. The wizard has cast Tasha's Hideous Laughter to incapacitate the enemy, and the rest of the party has spent their turns getting into position for a turn of big damage.

It comes back around to the wizard's turn. The initiative order is wizard, fighter, rogue, boss. The boss is still laughing, but gets to make a saving throw with advantage every time they take damage, so they're almost certainly going to break out of it by their next turn.

Could the wizard use Ready Action to prepare to cast THL again, with the trigger of "the rogue attacks the boss"? So just before the boss takes their turn, the spell is reapplied. It feels metagamey, since it's not happening for any sensible tactical reason, just the mechanical timing of the turn order. But if not, then spells like THL can be rendered useless by that arbitrary mechanical timing, and it makes it impossible for the party to take advantage of their momentary control of the situation to go "okay, everyone stab at once, on my mark," which seems like a reasonable thing to be able to do.

How would you rule it?