Need supports please

Yes, it's my turn to ask this type of question. Well with the upcoming Prisma event I was thinking of wanting supports and stuff like that and looking around I found that I need:

A high leveled, high skilled Summer mordred. Even if it's just the first and third skill (To fight against Medea Lily)

A high leveled, high skilled Mebd. For the skills even if it's just the first and the second.

A high leveles, max skilled (10/10/10) Shiki (To deal with Avenger Mebd. My high level Shiki friend just removed me)

Thanks everyone and yes my ID is...
884,876,279
My current support list is pretty decent, but they're all low skilled with the exception of Herc, Drake, Altera and My two casters and currently I removed Herc and Eury from my support list since they wouldn't help that much though... sorry about that.