Using the database values: that support card buffs +45 attack, lasting 2 turns. But your main attacker only activates under the opponent's debuff state — the buff window and your activation window don't overlap. You're spending a resource to produce zero incremental damage.

Correct swap: the +DEF defensive card. Survive the opponent's attack wave first, then deploy your high-cost finisher for the comeback. Current build is burning resources inefficiently. This needs to be fixed before the next ranked match.