The key card is present but its support is thin.
Prioritize useful support such as Bile-Vial Boggart or Elder Auntie.
Blight Bile-Vial Boggart to upgrade Cinder Strike. Its death counter can weaken another creature, while Goblin death payoffs add damage.
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.
Blight weakens one creature by the full amount. Do not accidentally kill the payoff you needed to turn the cost into value.
The support is missing
Favor independently useful creatures and interaction if the narrow support does not arrive.