User blog comment:Havocgale/Team Assistance/@comment-359947-20160605130855

Kloe is a beast for a 4-star unit; not in terms of attack, but in terms of defense and utility. Since you have limited party cost, you could stick her with Thomas and Audette, who I've found to be solid 3* characters. I beat the entirety of Book 1 and half of Book 2 using a mono-knight team with her, and could possibly have gone further if I hadn't switched to a team using...

Marena as the main character. She's best when you build a team of characters that have one mana skills. This would likely be a rainbow (multi-color) team, and if you were going to do that you'd probably want a mana slot slower. The only one I see at a glance is Shaly, and she has a 3-mana skill that would be detrimental in a Marena team. She's expensive for a sub-party character, with the party cost you have. So I would skip a Marena team for now and come back to it as a possibility. Your best bet there is either Neau when you eventually get a copy (she is SUCH an OP 3*) or grabbing a copy of Frau when she shows up on the ring exchange again. (Or from arcana coin pulls if you're lucky.)

Lilith is useful almost anywhere and you already have her maxed.

Other 3* characters I see that I've found helpful are Bilgitto, Minimo, Toto, Melvina, and Kilie. You have a lot of amazing characters, but with low party cost you're limited in what you can do with them. Opinions vary, of course, so anyone else should definitely chime in!