Star citizen recently made my system hit 32GB of system RAM and 13GB VRAM for me on Linux. The story doesn’t change much on Windows.
If you need specific help with Star Citizen, feel free to join the Linux Users Group (LUG) Discord. https://github.com/starcitizen-lug/knowledge-base/wiki
Oh and I also have a DXVK.conf and the only way it worked was to put it inside the wine context then use 'DXVK_CONFIG_FILE=/home/xxx/dxvk.conf" ENV VAR in lutris. I put it at the root just above the c drive folder.
Hope this helps.