Valkorion.Peak Valkorion >> Outlander/Unchained Vaylin/Arcann >> Outlander > Unchained Vaylin >>> KOTET Chapter 9 Arcann <~ Chained Vaylin > Spirit Valkorion >>>>> Ziostiate ~ killing and consuming all life on Ziost.
Essentially, we see that in KOTET Chapter 9, Outlander w/OP holocron + Unchained Vaylin + Redeemed Arcann are utterly overpowered when Valkorion says, "Enough!", snatches the holocron, crushes it, forces the rushing Vaylin and Arcann into submission, each with a casual gesture, then blasting the Outlander with TK and assaulting him with TP. Furthermore, we see that Valkorion is casually able to force Unchained Vaylin to submit to him with TP, and even upon the Outlander's insistence to resist, Valkorion simply applies a bit more pressure, and Vaylin is back under his control. Valkorion could even rejuvenate Vaylin's spirit seemingly indefinitely, thus forcing the Outlander to free her via the holocron. If we assume some degree of relativity between Valkorion's spirit utterly ravaging the trio of Arcann/Vaylin/Outlander w/holocron's spirits and how their physical forms, we can deduce that Peak Valkorion >> Unchained Vaylin/Outlander w/holocron/Redeemed Arcann.
Obviously, the trio collectively would be vastly superior to any of them individually. This leads us to the Outlander, who proved his superiority to Unchained Vaylin by:
a: tanking her final force repulse, essentially walking through it and gutting Vaylin through her force shield.
b: directly defeating Unchained Vaylin's spirit in combat.
This leads us to Unchained Vaylin, whose powers are infinitely greater than those of Chained Vaylin, given that prior to becoming fully Unchained, while undergoing the transformation, her power is stated to be "racing out of control," and she essentially goes from being utterly overwhelmed by and struggling immensely with the 6 sun generators, to completely overpowering them upon becoming Unchained, (and proceeding to casually blow up the whole BRAIN experiment from orbit, to boot). Thus, Unchained Vaylin >>> Chained Vaylin.
Even Chained Vaylin has absurd power curves, though. She goes from being frozen in Valk's time stop, (one where Valk, ironically, mentions how Vaylin's power grows exponentially, and that if he doesn't kill her efficiently, he will die). Vaylin of course completely stomps the Outlander, thus forcing Valkorion to intervene with his time stop. But this time, literally 5 minutes after Valk had Vaylin froze and warned the Outlander about her exponential power growth, Vaylin completely overpowered the time stop in mere seconds. This caused the Outlander to note that Vaylin was even stronger than Valkorion, and the Immortal Emperor had to resort to using her conditioning fashioned by years of rituals on a void meant to "limit her growing power."
As mentioned in the first Reactivation, Spirit Valkorion >>>>> Vitiate as of when he consumed all life on Ziost. Essentially, the gap between Vitiate from the beginning of the Revanite War and Vitiate right before he consumed Ziost is microbial compared to the gap between Spirit Valkorion and Vitiate right before he consumed Ziost. I've also already spoken for the power Ziostiate wields, from the beginning, middle, and end of Ziost.
So, yeah...Peak Valkorion >> Outlander/Unchained Vaylin/Arcann >> Outlander > Unchained Vaylin >>> KOTET Chapter 9 Arcann <~ Chained Vaylin > Spirit Valkorion >>>>> Ziostiate ~ killing and consuming all life on Ziost.