With the recent discovery of the bike shop, it opens the possibility of making a cart to transport dreamers to the armory, that would turn a few hours trek into a much easier journey.

This timeline looks good, the location of our last stand could be wherever the most people are or what needs protecting (if it's the armory, cool!) This assumes Riku survives that long (I have no idea what injuries Riku might get) but other than the various unpredictable parts I'm down for this!

EDIT SORRY it does look like a lot of people are interested in sticking to the Invincible, so that might throw a slight wrench in that Riku will prioritize defense in order of: where most of his friends are, followed by where most of the people are.