That pretty much depends on the content you run. If you know you dont really need heals, drop Sol for her and bring in some huge spike damage. If you know you need heal, cleanse and/or dispel, then you pick Sol back up.

Most content from now on requires you to be flexible with your teams. The more options you have for the content, the better. In highlevel Greed Raids, you probably wont need much heals. Either you paratrain and dont take damage anyways or you are getting slaughtered anyways cause heals dont matter at some point anymore.