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You are right. Pay down all to 0 but one at under 9%, preferably under 5%. 3 cards is plenty plus you don't need to waste an inquiry (point drop) or decrease your AAoA which would also result in a point drop. Don't listen to them. You know better. Unless you are ready to suffer a temporary point drop for a longer term point gain. The only way additional cards can help you is in your utilization. Maybe you can request CLI if you have a good history with the CC you already have but with most CC companies it results into a hard pull (point drop). So the game is yours to play. If you need the most points now in the short term, I would stick to 0 balances on everythig but one card under 9%.