200 OK http health monitor for multipple application on one server

You could configure a separate health check for each application, and then at the pool level select each of those health checks (they should appear in the "Available" list for "Health Monitors" - just move the ones you need over to "Active. ). After that, for the "Availability Requirement" parameter, set that to "All". As long as all of those checks pass, a node will be marked as available.

That's one way to do it.