You need the oval rail clamps from Specialized if it is the one with carbon rails.
https://www.specialized.com/fr/en//anodized-clamp-79mm/p/156616?color=232967-156616&searchText=2812-9050
3500km all offroad on my Sram hollow pin chain, I bought a spare in 2019 after reading about chains snapping but its still in its packet.
I suppose it depends how you ride, I spin rather than stand on the pedals, terrain around here is rocky and sandy, and very hilly.
https://www.emtbforums.com/rapid-racer-products-proguard-max-protection/
Review by Gary here,I fitted the front guard on the back as well, just needs a small cut out for the chain.