Some Battle Songs can be useful at the time of battle but they take a space on the inventory slot for each one so if you want to get three of the buffs you need to give up three inventory spaces.
I had the idea of some kind of Battle Songs libretto where you can storage up to 3 songs and have collections for different occasions. You left click to open and select which song to sing.
Something like this:
1 song
2 songs
3 songs
