Still upgrading stuff to level 9, but once I'm ready to upgrade to level 10, I'll then upgrade my credit and alloy storages and research center and then begin upgrading to prestige. That way, as I get stuff to level 10, I can upgrade them to prestige as I go. To be honest, everything will probably hit level 10 before I get half of my stuff to prestige, including the walls, assuming the dev bases retain their tons of loot, but at least it'll be quicker than waiting for everything to be level 10 before starting it. Besides, I believe jets get a major boost in attack power at prestige (barracks will be my first objective for prestige, followed by factories). Though we'll soon find out what the requirements for level 10 and prestige will be next event, maybe. It'd be nice if we didn't have to work too hard to complete the main story for grind crates.