If you go second, this deck usually results in a draw. Sometimes a victory or loss, but neither result is consistent.
If you go first, you can guarantee at least a draw. But usually a victory.

(1) Place Lucia in bottom right corner. Marielle always responds with Nanamo above Lucia.
(2) Place Thancred in top right corner. Marielle (majority of the time) responds with Griffin to the right of Thancred.

If you get this far, victory is now guaranteed.

(3) Place Squall in the top left corner. (capturing Griffin)
(4) Place Nael in the center (capturing Nanamo)
(5) Place Behemoth in remaining spot.

Note: (Behemoth card could probably be any other 3* or below card since it's not capturing nor being at risk of being captured).