The key card is present but its support is thin.
Prioritize useful support such as Shock Brigade or Nightblade Brigade.
After a mobilize attack, sacrifice a surviving Warrior to Worthy Cost before the end step. Stormsinger rewards that death while the removal clears the next attack.
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.
The Warrior cannot pay a sacrifice cost twice. Decide whether combat, removal or a separate sacrifice outlet gets the creature.
The support is missing
Favor independently useful creatures and interaction if the narrow support does not arrive.