APM SSO + Stream Profile

I'm trying to configure APM with a client-initiated SSO using forms based authentication however; the internal application requires a ton of search & replace which was done without issues using a stream profile. If I insert APM infront of it how would I go about assigning the stream profile as APM would be rewriting all the requests?

 

USER ---> APM ---> Portal Access (web-application)

 

I soltuion I came up with is USER ---> APM ---> Portal access to internal VIP (same IP as the application/no arp) and assign the stream profile to that VS