Is there any possible way for Trizza to survive well into the events of Homestuck? Because as things are it appears she's doomed by canon.

Heavily, heavily, heavily, heavily unlikely. There’s already talk about the protagonists surviving through the Snake Portal, but Trizza’s a ruthless lowblood mass-murderer and kind of a dick? Even if the Snake Portal provided the means for everyone to escape somewhere else, Trizza is still. An asshole.