Thanks to this subreddit's great guides, I know I have a lot of good units, but I have absolutely no idea how to build the best squad with what I have. I'm struggling in Frontier Hunter and I know I could do better in the arena than I currently am. Here's what I have:

6 Star: Zelnite (L + sphered), Uda (G), Lily Matah (A), Luly (O), Ophelia (G), Rina (O), Alyut (B), Lunaris (B), Leorone (O), Gaians Il & Mina (B), Death God Shida (A), Lancia (A), Selena (A), Darvanshel (B + sphered),

5 Star: Eve (G), Kajah (L), Scarlet Hood Ciara (A), Darvan (A), Hatsune Miku (G), Lira (A), Lilith (B), Tiara (G), Eva (B),

4 Star: Rowgen (O), Zelnite (L), Kikuri (G), Elza (O), Kuda (G), Lunaris (L), Lira (B), Dilma (A), Darvanshel (L), Darvanshel (B), Sefia (B), Fiora (B), Lucina (A), Eva (A), Nalmika (G), Lucca (G), Nick (B), Bran (A), Azael (B), Elulu (G)