Chang, Teilia, Mao, Chirico, Kei, all need spiral extractors. That's 4.
Shinji and Ryoma need DEC chargers. That's 1 more, making five.
…Something tells me this isn't as big an issue in this game.
Less interesting parts, I suppose.
Haros are important.
As are hakai/sasai crests.
And the stuff obtained after the third clear, I could do with more of that.
Should be fun.