There's no need to set memory limit.
The auto detection should work perfectly fine so also no reason to use extra threads.
Keep the large pages enabled.
Not sure about hyper-threading i believe the game uses every logical processor anyway.
But parameters won't really give you better performance at all, rather inform yourself of the graphic settings.
Some other useful stuff that you might want to enable would be ( -skipIntro, -noSplash, -noLogs, -noPause, -world=empty/altis/whatever world u want to load )