User blog:Tomate24/i need help!

i have a lot of unit, and i don't how wich one i should use on my team, my total cost is 216 so i can only have one omni unit and four 7* untis. (i have a few 7* untis that i can evolve into omni please tell me wich one i should use) my units are:

fire: avant, vermilion and adel

water: sareas, elimo, lucina and tridon(breaker tho)

earth: libera, duran, avani,estelle and andaria

thunder: zedus, shera, rize, rhoa, rahgan, reud, lafiel, reddrag and bonnie

light: krantz, jed, charla, rouche, layla, Izuna, Aurélia, Carrol and allanon

dark: Nyami,Kafka, Febros, Laberd and mizerka(oracle tho)

thanks for the help :)