If Blue begins, its a 70% winrate guarrantee

Place hilda in the top right corner. the npc will play yotsuyu and take hilda. put lucia in the bottom right corner. Npc will , normally, follow with Kan-E-Senna in the bottom line, middle slot.

Put Estinien now in bottom left corner to turn Kan E senna.

What happens after that depens of the npc deck, but 80% of the time you'll use Squall to turn one card, taking you to Ex Aequo and THEN use Ysaylle right in the middle to turn Yotsuyu and seize victory !

At first it seems like you are loosing, but you are actually playing the long game. Enjoy!