I would suggest going for Bamboo Rice or Gingerbread since they may come in handy as strength or defense. Then again, I'm not rlly sure how many shards you can get once you summon a UR you already have (maybe around 20-25 shards?)
Sorry for the late answer, Revelery. Kinda forgot about the recall event for a while :) Thanks a lot for your advice. I still don't know who I'm going to go for but strength or defense that's for sure. Probably defense actually.