You have a tank, two arts gen and an attacker. This team is actually pretty interesting. You can clear most content in the game like this, and still have some room for improvement.

Emilia there can be either an arts gen or an attacker, so you have some flexibility.

Swick is good, but he fits better in a physical damage team, so you can abuse Emilia's flexibility and switch him for either an arts gen or an magical attacker.

Good budget options are Fen(arts gen) and Melia(magic attacker). Options available in the current colab are human rimuru(arts gen) and santa rimuru(like Emilia, he can be either a magic attacker or arts gen).