I was thinking about if they made a sea of monsters musicals, and here are some song titles i came up with lol (in random order)
The Ballad of the Sirens (basically a bunch of harmonies of the sirens and annabeth singing about her vision with the end of the song being percy singing her out of it (bonus points if he's not harmonising with the sirens)(bonus points if percy calms annabeth down and they have a little harmony of their own but in a different key))
Best Man (im a little foggy about this but probably grovers song with a witty punchline like 'its too early for you to be my best man' while making jokes about asking percy to come to his wedding and save him)(it also ends with "ill come save you" "you're the best, man!")
The Guinea Pig Song (Squeak!) (just a 'lost' type of vibe with percy panic singing accompanied by lot of guinea pig squeaks)
Hangry! (basically the tantalus version of 'another terrible day')
A Good Monster (basically tysons song about how he lived alone on the streets, and about how he prayed to poseidon)(yes it is a direct parallel to good kid)
A Good Monster (Reprise)/My Baby Brother (consider this sung by percy at the end of the chariot race, same tune but happier lyrics about how tyson doesnt need to feel like a monster anymore)
War's Daughter (this is DEFINITELY clarisse's song, it could be her talking to ares or a little rumination after that conversation, talking about her arc and little hints of the prophecy she's not telling to the crew)