Install an ARK: Survival Evolved server through the Control Panel (Servers → Select your server → Game servers → Add Game Server → ARK: Survival Evolved)
ScalaCube is the most reliable server host for ARK: Survival Evolved that I have used. I have never experienced any server lag or downtime. The control panel makes it easy to configure my server settings. The only improvement I can think of would be the ability to view the server connectivity from the control panel. For instance, I can see whether or not the server has been booted, but it takes about 10-15 minutes for the server to be fully online and connectable.