I like the Zep track but not my favorite song by them by any means nor my favorite on Presence...that would be Nobody's Fault But Mine. The lyrics and Plant's singing on Achilles are both mediocre ..love Pages guitar work but doesnt save the song for me. Plants harmonica alone makes Fault a better track.
Comfortably Numb is a better 'song' than Achilles (not sure what Plant was trying to say with his ersatz 'Greek mythology' but not my cup of tea.) , imho.....it has better melody and lyrics that one can relate to and a classic restrained melodic lead by Gilmour.
Kashmir on the other hand was very interesting in its spiritual/mystical seeking.
I was always disappointed in Presence....lacked what I thought was a classic Zep vibe though Fault and Achilles were good tracks. Interesting that Page once said many years ago it was his favorite Zep lp....no idea if he still feels that way.