Best practices to publish MS 2012R2 RemoteApps?

We need to publish MS RemoteApps (Win server 2012R2) for external users coming from Internet, which are currently using native RDP clients. Basically replacing MS UAG and to get a smooth user experience. Would like to use APM as we are using it to authenticate users, do SSO and publish other apps, like SharePoint and SSLVPN and OWA.

What are our options on using LTM+APM? When using APM on sw version 11.6, with its native RDP proxy/RDG, the APM seems not to be able to publish RDWA or Remotefeeds at all. Putting RDWA on webtop breaks the RDWA page totally. Nor have found any way to put remoteapps on to the webtop.

Any advice?