Looking for help on a team for arena, haven't tried intermediate or advanced yet. So far, I am unsure on who to exactly use. Got a bit lucky with summons, but these are the 5* units I have: Cordelia, Camilla, Lucina, Tiki, Robin, Linde, Fae, and Takumi. Also, I'm debating which healer I should advance as I do not have Sakura. It's either between Lissa, Clarine, or Serra. And pros/cons between why I should choose that healer would be helpful.