I’d personally suggest going back to Fort Condor every time a new battle unlocks. It might seem like a bit of a hassle, but the rewards are worth it and can really help as you progress through the game. Plus, it’s less overwhelming to deal with one battle at a time rather than waiting and having a bunch to do all at once. That’s just how I like to play though—if you're someone who prefers doing things in batches, you could stack them, but I find it smoother to handle them right away!
