Treasure

I focused solely on Tre-Fes. Otherwise, I basically didn't use my command points because I didn't want to waste them. On days without events, I was collecting titles from old legends or playing event stages that seemed unlikely to spawn aliens.

I get it lol. When I was in a similar situation, I was just thinking, 'If I can just get through the space arc...' lol

I only did it during Tre-Fes, but it kept failing so I ended up using Treasure Radar lol

It's tough, but the great thing about this game is how much changes just by collecting treasures. It's easy to get stronger even without paying.