Damn, I'm going to try this team up then, sounds pretty solid in my opinion, the key is rolling as many dice as possible so if you say you can stack them infinitely then it's definitely worth a shot, thank you for the lineup and guide!
Once you unlock Alice, you can replace Phoenix. Alice doesn't need to use active skills, but passively rolls multiple attack dice based on her initial MP per turn. Of course, it's best to purchase the MP item from Tasha's shop before using Alice to replace Phoenix.
Theoretically, apart from the protagonist, Anna, and Adrian, the remaining position can be anyone, because relying on these three people is enough to easily pass the level.