You paid a specialist Pro Tools systems builder? Where are they in helping you fix this?
If you are not finding anything useful in your search on DUC for 9093 errors you are probably doing something wrong with you searching. Since the forum search is awful you should be using Google e.g. search for
AAE "9093" site:duc.avid.com
or
AAE "9093" site:avid.com
Using -9093 will hide any mention of 9093 errors in Google search (that Avid still sticks a stupid negative sign in front of errors is beyond me).
You followed this ?:
https://avid.secure.force.com/pkb/ar...-Errors-on-Mac
Nobody has any idea what system you have... where is your expected Sandra report? e.g. Memory DIMMs all match, and are on the Mobo vendor qualified list? Using nice fast PCIe/NVMe drives? Hopefully not overclocked, etc. What session sample rate? IO Buffer size? Disk cache settings? Interface and driver? Does changing any of those help?
What exactly happens as you work though standard troubleshooting under "Help us help you" up the top of each DUC web page.
Is the system fully optimized? By you...following the instructions under "Help Us Help You" you carefully checking everything, all BIOS settings etc. every last one no matter how inconvenient for now. Saying "I've done all the recommended Avid tweaks" really tells us nothing about what you have really done or what "recommended tweaks" you are aware of. What *exactly* have you done? Either write a list or point to instructions you have followed carefully.