Tweak wow for best performance. Not talking about wow settings

I know I should have raided my drives but I wonder if any nerds out there have tried anything else.
Example: I can create many swap files on each of my drives but
is there anything similar I can do with WOW and span cache folder to
many drives so read and write will speed up?

Just thinking of the impossible. #lulz

Kinda curious about this myself, but never bothered since my game runs mostly fine.