Access VMware Workspace Portal/Identity Manager using BIG-IP Access Policy Manager (APM)

I'm not exactly sure what the best setup for us is yet. I'm working on a POC with vIDM on-prem and integrating it with Horizon View/RDSH Apps. We already proxy View connections via APM for external access and everything works as expected. With the vIDM integration, accessing View internally works great but externally it appears the APM auth gets in the way. I've read the guide on how integrate APM (as SP) and vIDM (as IdP) so we can translate SAML to kerberos or header-based credentials for SSO access to internal apps. I was hoping there was something similar you could do for View connections but maybe had to incorporate some iRules to handle the auth request coming from the View Native Client.

To make a long story short...just looking for some guidance on how to access View Desktops/Apps externally via vIDM when View is being proxied by APM. Any assistance or design recommendations would be appreciated.