Would it be possible for a light and hope player to "undoom" a session? Like in the event there isn't a space player or the other required components, but the luck and hope of those two players is influential enough to trick SBURB into making things work out perfectly Perhaps a Lord and Muse of either aspect could pull it off?

Rather than ‘Viable Sessions’, I tend to see the Space-Time requirement as something to make a STABLE Session. I do believe you may be able to Undoom a Session and win it in a number of ways, however you will most definitely need to pull off some Deus Ex Machina shit to make it happen. Hope and Light may be a good start, but it’s likely the ‘Luck’ and ‘Hope’ would manifest as something from ANOTHER Session luckily getting there, rather than beating it on their own.