In fact, it's all the same, mainly depending on which discount you prefer, which discount you use more, and what gift each card will give. Anyway, it's all the same. It is worth noting that it is not advisable to handle too many credit cards. 2-3 cards will be enough. Set the billing date on different days, so that the repayment will not be on the same day and the pressure will be less. Pay attention when swiping the card, and swipe the card farthest from the next accounting day.