/jp/ - Otaku Culture

Are there any good tips about Priconne that I can't find from Gamewith/random Google docs? I'm stuck on 8-14 and I struggle to beat teams in the arena and I know that both are because of my team composition.
I'm using Anne, Grea, Chris, Shizuru, and Nozomi because Kuuka blows up very quickly, even against magic attackers, and Hatsune doesn't deal enough single target damage. How could I improve my party with the characters I have?
A couple side questions: How important is it to join a clan and should I be using entirely physical and magical parties?
I want to get Makoto and maybe uncap Io, but I'm not in a clan and I'm saving up for the next prifes to roll.
It took forever to find the words to ask this smoothly but it probably still reads like shit.