Ast cards should stack.

[MorbolvampireQueen6]

You can't really stack two songs. The crit buff is given to all the other party members but the one who's singing (the BRD). If another BRD is in the team and decides to play a song, it will, technically, only affect the BRD not affected by his own song.
So I don't think this applies here.

And if a BRD uses Troubadour on one song and another one decides to use it with a different song, it does not stack, it replaces the effect. Which is quite annoying to be honest.

1,bard can use foe req while another uses crit again both are songs allowing the songs to be rotated plus songs dont share cd

2 get ur good cards u habe 2 use all ur abilitys even then sometimes u get screwed but for example sense lets say u got good one now lets say its arrow and other person has spear. this are 2 different effects which 2 get puts it all on cd they should stack