IMO Initial, Returns, and Setsunai Sandglass are top tier Poppin' Party and even top tier Bandori songs.

I get chills when the music slows down in Returns just before the chorus. <3 Setsunai Sandglass has deeply poetic lyrics and Kasumi sings gorgeously. Initial is just classic. It has so much power, a memorable memory, and yes, the lyrics are boppin'!