Turns out with the dungeon revamp, it is no longer possible to get R1 Musical Knowled
because Barri Adv for Three no longer exist.
Pretty sure all the "for x" dungeons were compressed into the singular ones. So Advanced should be able to drop it. Seen a few skill books drop from other things.
To add to that, you can encounter specific bosses based on the amount of party members you take in. Say for example you need Arrow Revolve page 8 from what use to be Alby Int for 4, you'd take 4 members to Alby Int.
Originally Posted by Poshwosh