Texture cache has nothing to do with EFB. However, pretty much everything works perfectly with it set to fast. Just put it there, and leave it there forever.
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 48GB
GPU: Radeon 7800 XT
CPU: AMD Ryzen 5900X
RAM: 48GB
GPU: Radeon 7800 XT