I did forget another such silver actually. I could see Mitsuki being pretty handy, effectively most of the time guranteeing the full heart activation, so there's that I guess?
Hopefully a better sub field emerges eventually. If she were Light she'd be SUPER cool because of how many of those there are, including a little bit of farmable stuff.
Also, I had an idea for what I want AUzume to be:
R/L
Phys/Healer
Mats: Surtr/Sandalphon/Yatagarasu/red jewel/light jewel
AS: Sun Goddesses's Protection
Heal 3 turns of bind, prevent binds for 1 turn, haste 1
LS: Dance of Returning Light
1.5X HP/Atk/Fire, 3x Atk for F/F combos
I dunno. Mind going out there I guess.