Currently when viewing my servers in RTMT I can see my pub and 2 subs and IM&P. However I cannot view my CCX nodes unless I open a separate RTMT window. Can they be integrated into a single RTMT session?
Correct, separate connection from RTMT is required for each cluster. CUCM/IMP are in the same cluster hence you can see them both, but if you had multiple CUCM/IMP clusters those would require separate RTMT sessions. Unity, CCX are completely independent apps thus requiring their own connections.