Install a Deserted Island Scenario server through the Control Panel (Servers → Select your server → Game servers → Add Game Server → Deserted Island Scenario)
Server performance is the best I have had so far 8 chunks loaded 2 players @ a render distance of 20 chunks each with each player at their own base, flying around doesn't lag at all. Highly recommended over anyone else I have ever used (apex hosting, bisect hosting)