Still using bits and pieces of the conversation as pointers to re-examine clues here and there, but with regard to the Eden stuff...

The first thing Mitron says:

Mitron
I am Mitron, servant of Zodiark.
and during the battle

Oracle of Darkness
In Lord Zodiark's name!
How do we hand-wave those?

Though, ironically, if the goal is to slow time to spend eternity together, didn't Nabriales say that was within Zodiark's power? lol

Nabriales
By Zodiark's name I command thee!
River of time, mire mine enemy in thy sluggish flow!