Don't think of them as spells; they're not magi. The abilities they have are the massive conform of spirits that adhere to various emotional aspects of a person. It's not singular, but plural, and the massive gathering of them creates the specific attack.

For your bard-trope, I'm definitely thinking of the exotic effects that bolster and fortify. Then again that all depends on how these songs carry out in tune. 

I would suggest: Empower; Frenzy; Vigor; and any of the elemental resistances. 
Possibly Dispel as well.