Okay now that I have calmed down it is halfassed theory time;
Okay, we still have a few options for Jade, first is Janes life powers, but she'll have to survive too for this to work
The rest are slightly more complicated, I've seen some people saying Dave will use his time powers to stop it, this would only work is Aranea fails at healing the doomed timeline, otherwise he'll just create one because we didn't see it happen, which is what you need for a stable time loop
Then there's John, if he shoes up he can easily fix it with no consequences, but his power only works in the alpha timeline (or at least thats what I assume using logic) so if Aranea fails in healing it he won't actually appear in this timeline so he will be unable affect it, but then of course this timeline might not have been doomed just yet, the idea is that it will when she essentially stops LE from being created that it will become doomed, but she might not succeed, so these events might be accounted for in the alpha timeline