Services like MyArena often provide "one-click" installations for CW/Mix servers, which are pre-configured for high performance (1000 FPS/100 Tickrate).
Ensure you use a version compatible with the older v34 engine. Add WarMod: Upload the WarMod files to your addons folder. skachat gotovyi server cw mix css v34
Detailed walkthroughs on Steam Community explain how to set up a base server using SteamCMD before layering on the Mix plugins. Basic Setup Steps skachat gotovyi server cw mix css v34