For best optimization with the "Set Master Pose Component" node, Is it better to create a simpler skeleton for accessories or just re-use the character skeleton?

I have a character:

I want to create accessories for my character:

A whole skeleton just for a mustache seems excessive, no?

Would it be better to create a duplicate of this skeleton with only the required bones? Pelvis to head? But if I want to use this, I’d be importing a separate skeleton into the project, instead of just being able to assign my character’s skeleton asset to it, correct?

Are the gains from not having useless bones worth having one more separate skeleton asset?

And how many separate skeletons can we practically have before this separate skeleton method is not worth it anymore?