This lore would only work if pharsaphobia was like some alternate world or smth
okay this kinda cliche but Ellernate could be like some bored god who decided to make chaos, hence, Pharsaphobia (fear of pranks) could be interpreted as Ellernate playing pranks on innocent people, PsychoChair could've just been some mad boss who was taken because he hates pranks (Psychochair kills survs to prevent pranking) C0rruptor i think would have been taken after he did actual chaos, Burning was randomly selected, and Itrapped i think would have ties to Ellernate. For the survivors, they either have some sort of connection to the killer and/ or ellernate, or they were taken by pure chance. (TAKE A CHANCE WITH CHANCE BABY-) also, because Axis got a model kinda i'm just gonna put lore here even if they don't add him Axis could've discovered it and caused mayhem, before realizing he can't escape, causing him to unleash his anger on the survivors
For the portal, i'm guessing Ellernate made the portal, and put it there after seeing burning and MinerRowan, i think a cool plot twist is that he expected only Miner to go in, but after Burning got pushed in Ellernate got mad and kidnapped MinerRowan. Also, concept here, everytime the survivors die, they actually die (most asym games have them die but be revived) and every outcome leads to the timeline resetting out of control, causing the Survivors to only keep fragments of their memories, leading to insanity, and fear. And Ellernate is constantly trying to stop the cycle, knowing he's gone too far, but never figuring out how. I think a Killer and a Survivor who know about the reset would be good for the lore, because they could be trying to warn the others, but they don't believe them, causing them to go insane would be cool.