Additional suggestions for rankings:

Eidolon
Esper
Aeon
GF
Summon
Magicite
Totema
Avatar
Primal
Egi

As you can see, I like themes.

On a side note: I can't believe I actually got that crest right (I did, didn't I?) - the image of the different designs wasn't working due to a problem on my side, so I had to muddle through with Loco's descriptions.