What is the best practice for several soundclips a gameobject need to play?

Questions & Answers
1

Should you have one Audio Source for every soundclip an entity might splay at some time? Or should you have a script where you attach them?

From how sound source is designed it looks like it’s supposed to only hold one sound clip, as compared to Animation which has a list you can just add to.

2

Multiple AudioClips is better approach for sure.

Manage them by script with one AudioSource, because every AudioSource not playing anything AFAIK still takes memory.
Plus multi-clip way is much clearer in editor.