Yeah he got kerry for a valkyrie role and i dont think he needs a second one. Claudia cant be cced and do decent job even at 37 level so u'd want to add her to main team. If you complete the core somehow or like sorano said and leave 1 spot empty, then put the dancer there, i can imagine the possibilities of using her, tanking bosses, clearing swarms quickly... Well she'll gonna take a dps archer or an healers spot but either way using her makes that spot more stable, i think.