What spare parts are good to have in stock?

So, last time I switched nozzles, I noticed that my Hotend Heating Assembly on my almost year old Bambu Labs A1 mini, is bent where the right side of the clip grabs (I attribute it to user error combined to often changing of nozzles, and the softer metal that the heating assembly is made compared to the clip). I used a screwdriver to bent it back to shape, but if I know something about soft metals it’s that it’s disaster waiting to happen. So I will proactively order a new Hotend Heating Assembly to have it on standby replacement for the day this happens.

So I was wondering, if you know if there is any other part on the A1 mini that breaks down and needs replacement often? I’d rather get it now, than wait for a malfunction. I am not talking about consumables such as the filament cutters or nozzle wipers, I am looking for spare parts to have in stock.

Thanks for reading.