I have posted this some time ago on wiki, but still not sure what todo with 14 copies of Emilia.
Note: Kerry 11 UP

1) AW Kerry and boost her lv because class bonus EXP combination

2) Lv up not same class plats (Probably Imelia or Shizuka) using 2 Emilia + 2 Spirit OR 1 Emilia + 3 silver spirits (I have a lot of them unexpended)

Also, do I need Emilia as a unit? Because I don't fell like rising her at all. My duelists at the moment are Sherry, Claudia, Imelia, Kerry and Conrad. I don't know if I can call her duelist, but there is also Horace.