This is good advice. I played through all 4 levels of the event phase really just to see how I'd do, and I managed to complete the first three but only clear the fourth one. Even though I was really close to completing it, I still haven't attempted it a single once since. Instead I'm leveling my girls in 1-3. After all, why would I waste 120 stamina failing the Ultimate map today, when I could clear it with no problems ten days from now.