I beleive that you should be able to nlb cluster the hub then creat two EMM dmg proxie servers connected to the hub cluster and round robin or load balance without issue. You may need to keep the database on a separate SQL server.
Have you checked the install guide or other guides on the docs page?
Thanks for your reply, this is useful information!
I'm going to try and setup the servers like you said. i also received these docs;