Hi Reuben,
For ACE to perform https to https redirection, it should be able to look at the HTTP header. And for that to happen you would need to configure SSL offloading on ACE. Once that happens, redirection should work fine. Please have a look at below link for configuring SSL termination.
http://docwiki.cisco.com/wiki/Cisco_Application_Control_Engine_%28ACE%29_Configuration_Examples_--_SSL_Configuration_Examples#Example_of_an_SSL_Termination_Configuration
In your case, the serverfarm would be redirect serverfarm and rserver would be the redirect rserver. That's the only difference.
I have done it in the past. If you need configuration assistance with the same, let me know.
Regards,
Kanwal
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