So there's two ways you can look at this.
First: Do you have another bow flier besides Hinoka? If not than merging them might be your best option since believe it or not a bow flier can end up being really valuable to certain teams.
Second: If you're not in need of a bow flier than i'm guessing you already have some candidates in mind for those skills of hers. If so than will those be the additions that will put the receiving unit (or units) over the top for you.
The benefit here is there isn't a wrong choice it's just going to come down to what you are in most need of.