However, you can use these options depending on the context:
* A shower of wishes: This emphasizes the abundance and rapid succession of wishes.
* A constellation of wishes: This conveys the idea of wishes being distinct and yet connected in some way.
* A tapestry of wishes: This implies a complex and intricately woven collection of wishes.
* A chorus of wishes: This suggests a unified and harmonious expression of wishes.
Ultimately, the best collective noun depends on the specific situation and the nuance you want to convey.