Two at 50% will definitely give you the best score. If they had very different interest rates, then there would be a good case for getting both cards to < 70% amd then spending the rest on the card that was much higher interest -- just to save yourself money.
The most important thing for you to do (since you ask) is to look carefully at how you got to that place (without beating yourself up, no condemning voice allowed) and using that insight to develop a plan for how you will get all of the debt paid off. Your goal should be to owe nothing to the credit card companies. Once you do, that will open up a new chapter in your life, where you begin saving and investing money, rather than owing it. You'll really like that.
