Your general team composition is okay for starting out, it just needs some more levels and CCing.

Aisha is one of the best blacks in the game, and should definitely be added to your team permanently and given some priority, she'll easily carry you. You can just drop Cypria for her, rogues just aren't the most useful class overall and resources are simply better spent leveling more important units.

Anemone is more of a niche unit that you might need from time to time later on, but I wouldn't worry about her until your team is in a much better state (maybe you'd be able to pick up a better unit by then).

You're probably way too early to be thinking about cost reductions, since you'll need a lot of fodders to CC your units. Once everything is settled and CCed, you can then start thinking about cost reductions if you have a lot of spares.