Thanks for the suggestion.
At the moment I'm going to be making a new team for her, though I will probably put Selena on the team for this season's arena as I have her in 5-star among the bonus heroes. With that said, it means I can pretty much build a team around her, with a Selena taking the red sword slot (I have a Ryoma at 40 who can drop in if I really need to). 5-star Effie is also available.
Also, any recommended B skill for Minerva?