CUCM 8.6 Manager Assistant Console

Question

I am currently setting up a test setup of the Manager Assistant Console in proxy mode and have a few questions about the proxy lines and the intercom lines.
In the setup guide, Manager and Assistant Phone Configurations tell you to configure the phones with the following setting: (We have 7962 phones)
"If using the Cisco Unified IP Phone 7900 series, except Cisco Unified IP Phone 7940 or 7960, configure the intercom feature "
I assumed that these were standard intercoms like I had set up for some other Managers in the past. I had gone to "Call Routing>Intercom" and set up an intercom partition (Intercom1), a CSS (Intercom 1 CSS, includes ONLY the Intercom1 partition), and several DN's for intercoms (3-digits and out of range of our regular 5-digit DN's on phones). Then I created some custom phone button templates that included one intercom line in addition to the phone lines. This keeps intercoms lines separate from regular DN's so users can't call someone's intercom line as if it were a regular DN and they use the whisper mode by default placing the receiving phone in speaker mode but muted so the caller cannot surreptitiously listen in on someone else. 
So, this is what I did also for the manager and assistant phones for use with the Assistant console. Simply created some more Intercom DN's and assigned them to the Manager and Assistant Phones using custom button templates that include a 'real' Intercom Line.
Everywhere else that talks about the intercom lines for the Manager Assistant Console seems to indicate that they are not 'real' intercom lines but simply regular DN's that have "Auto Answer w/ Speaker" turned on and are in the ONNET (everyone) partition. This means that there is no Whisper feature and the assistant (or anyone who knows the managers 'intercom DN' can spy on the manager. This is totally unacceptable.
I think I can configure this using 'real' Intercom lines that have their own partition (so only other intercom users can reach it) and have the whisper feature (auto answer w/ speakerphone BUT MUTED) except when it comes to the IPMA Clusterwide Parameter, "All User Partition" that is supposed to be configured with the name of the partition that includes the Intercom DN's AND the Proxy DN's.
The two possible solutions I can see are:
1. The Clusterwide Parameter is only for Automatic Configuration and I am manually configuring everything so maybe I don't have to configure this parameter while just using 'real' Intercoms in the Intercom1 partition while setting up proxy lines in the ONNET partition
OR
2. I might be able to configure the proxy DN's to use the Intercom partition instead of the ONNET partition.

Answer 1

The answer turned out to be 1. You can use real intercom lines just fine and in fact they have several advantages.
1. By using real intercom lines you initially get the one-way Whisper mode and the called party can press a button to go two way. The IPMA way are two-way only.
2. By using real intercom lines they stay intercom lines even when the assistant is logged out. The IPMA way causes the intercom lines to revert to normal phone lines when the assistant logs out.