Which Snitch to use for a multi-az, multi-region dse cluster on AWS?

We want to setup a 6-node DSE cluster with 1 node in a remote region. DSE documentation doesn't list EC2MultiregionSnitch as an option at all (http://ift.tt/1E9UPBQ), but that's what we used in the past for DSC. What's the best practice for AWS with DSE? Which Snitch do I use?