Go to SauceLabs and signup for a free trial account.
Each flavor of Saucery has its own template, simply install it and go.
Have a look at the ExternalMerlin.NUnit, ExternalMerlin.XUnit, ExternalMerlin.XUnit3 or ExternalMerlin.TUnit projects in Github for examples. You can focus on your application and your tests. No need to think about DesiredOptions at all. Integration with SauceLabs is seamless!
Execute your CI job and sit back as the awesome is unleashed!