I use
LF: Tidus
RF: Wedge
MF: Brother
RD: Doram (From Luca Goers) I just used the regular guys from the Aurochs until I round someone else.
LD: Graav (From Luca also)
GL: Jumal

I've been undefeated for the last 27 games, and two of my players are lv. 13. Brother is a key to my success because he is so fast. I give him the ball and run away from all of the other team. Lure them to you, but don't let them get you. Then you make an area wide dash for the opposing goal and shoot. Easy does it.