The key card is present but its support is thin.
Prioritize useful support such as Humbling Elder or Highspire Bell-Ringer.
Bell-Ringer reduces your second spell. Cast a useful first spell, then a discounted second spell while Disciple or Practitioner is present to earn the reward.
Your deck already enables the plan but is losing the early turns.
Take a castable early creature or efficient answer before a second expensive payoff.
A Jeskai label on a card is not permission to cast its red cost. Stay two colors when the white-blue curve and interaction are already complete.
The support is missing
Favor independently useful creatures and interaction if the narrow support does not arrive.