[BRD] Few questions about song usage

[Lyrinn]

1. Is there an easy way to text macro toggle on songs to let your teammates know when they're on/off?

2. (More general) Does macroing text to a skill also kick that skill out of the AQ, or only chain skills?

3. Ballad is obvious. Am I expected to know when to use Army's Paean for the team, or are people supposed to tell me when they need it?

4. Foe Requiem is obvious for burn phases with BLM or SMN in the party. What about outside of burn phases? Is there a good strategy for knowing when to use it and for how long to keep it on, since it drains MP quickly (e.g. use until 50% MP, turn off, repeat)?