I don’t use any tier list to determine the strength of my Sorc. The one you reference is tied to only Max Roll’s builds and those with accounts. Does not account for major variations.
I’ve not felt solid in T4 for quite some time with Sorc class; for me that is okay… Being S-Tier gets me no rewards, not even a cookie… Heck the only one who knows my build strength is me and my wife.