Episode 146 of the Letters Page: Writers' Room: Fanatic, Vol. 2, #32

As far as the Scions go, they're all dead (pending revival or retconning) except for Dark Mind (escaped), Voss (depowered and incarcerated, which can't possibly go wrong in any way), and possibly Empyreon.  Empyreon was in the middle of a massive explosion that put Captain Cosmic in a coma, but we never saw a body (does Empyreon the living black hole even have one?), so his fate is uncertain.  After all, Captain Cosmic survived it, barely.

Of the others:

Borr blowed up real good and is confirmed dead-dead by C&A in this episode. Nixious was blasted by Voss to conceal his treachery and also confirmed dead in this episode. Progeny took a time-bullet to the head and was destroyed by the newly-revived Chrono Ranger's time-pistol. Voidsoul ate the shadow cloak and temporarily escaped to space, only to be literally torn apart by the newly-empowered and focused Guise. Aeon Master got consumed by Lifeline and the energy reformed into Aeon Girl, who is more of a person than AM ever was (but in theory there could be some elements of AM's personality still reverberating in AG's mind). 

Faultless spent the last of his energy to pull Dark Mind into his body, giving her a physical form that empowered her but made her vulnerable.  Since she escaped with that body, some part of Faultless still exists, though it seems unlikely for him to return.

Sanction got mind-wiped by Omnitron and Parse's team-up hacking attack, so as far as we know, she's dead.  But that does mean both of them were exposed to Sanction's code-base and the physical body is presumably still around somewhere, so there's at least a potential path to come back.

Remember that not all the scions are represented in the card game.

Yes, I am of course referring to the scions from the actual card game -- the ones we know the status of at the end of Oblivaeon.