You could consider focusing finishing a rainbow team of 4*. A possible order per color, assuming same color feeding:
Red: Wilbur, BT, Kelile
Blue: Grimm, Triton
Green: Kashrek (he can be your tank on defense), Gadeirus, Belith, LJ
Purple: Tiburtus, Sabina, Ameona
Yellow: Li (almost fimished), Chao, Danza
5* you can consider when you are getting close to having all final tier ascension materials.
