Add the F5s as nodes to NPM poll via snmp. that should do the basics, obviously make sure your on the latest version of npm and a recent version of firmware for the f5s.
Then you should be able to go to the network tab on the left and see lots of interesting stuff. Also there Is a view called load balancing which will look like the appstack.
You can also get an account setup in the f5s with admin access and add to the node via a tick box under edit, this gives more health stats and allows member removal. (But my network guy wont give me admin rights. It needs them as it uses the api)