It'll most likely be SS.

Reasons:

1. Sazabi had an SR Version already. This leads to an inverse Hi-Nu effect (Nu already had an SS version before Hi-Nu).

2. It's Softmax.

Either way works....imo. I'd personally like it to be SS, instead of SR so people don't just "easily" cap it and actually have to work their way to getting Nightingale

I think it should also have a difficult to make plan, akin to HWS back in the day.

Sazabi C1 - Key
Perfect Zeong C1
Hyaku Shiki C1
Elmeth C1
Jagd Doga C1

...It's not TERRIBLY hard, but it's still difficult... right?

hmm, i wonder if I have a zeong somewhere in my hanger...

HWS was never difficult to make at all...

wish 00R was as easy as HWS e..e

LOOK AT ALL THESE A RANKS YOU NEED TO CAP
"MAN THAT SOUNDS AWESOME!!!"- Said no one ever.