Sorcerer's blade LLucina

L!Lucina is more of an offensive Player Phase unit. I barely see her adjacent to teammates or use her like that myself. If you have a different playstyle, you might be able to pull it off, but I think L!Lyn would make considerably better use of that skill.

If you do it, don't use luna because you're hitting the lower defensive stat. Go for draconic aura probably, or possibly even bonfire