Play it safe and you should be fine. I tend to win ~75% of the time with this deck. You want to get the first take and just keep trading back and forth, so try not to put yourself in a position where you give Lewena an easy double capture. If you have to start with Louisoix for the first card, I've had the most luck placing him on the bottom row in the middle column. Remember to take advantage of Fallen Ace when possible.

Good luck grinding.