Using Golden Apples to clear the Onigashima Shop

You mean the class statues?

Not unless you haven't ascended any of your applicable servants at all.

I would say no since you have so much extra already so you don’t need it immediately. You can always get more in future events and dailies

My vote is for no if that’s all you have left. Those are pretty easy to get so you might a well save the apples.