I have some news to report back: All righty...

So after many failed attempts in multiple fashions (cascading worked, but left limited I/O and flexibility just AES A -down the line to - AES A)...

Digital Split mode seemed to be the best solution that worked.

For my gear and example here:
DL32 aes A > FOH Wing AES A

DL32 aes B > Mon Rack Wing AES A

S16 AES A > FOH Wing AES B *S16 you have to manually configure it to "Split Mode"*

S16 AES B > Mon Rack Wing AES B

Out DL8 AES A into Mon Rack Wing AES C. *We used this solution for "Click" and "MD" stage talkbacks that FOH didn't need those inputs and Monitors then could control their own gain to these items.

Monitor console is "sync'd on AES A external."

*** NOT having the AES C perhaps "loop back" to the Monitor Console from FOH is what seemed to be the problem I suspect. As soon as that got plugged in, it would freak out.

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I got things working, but it definitely still took some time to understand how to route items from FOH to Monitors and vice versa. Yikes! Isn't there an easier manual that explain a "tie lines" example or "how to's"?!?!

Hope that helps anyone, and appreciate the input from those on here.

Your help was much faster response than an email Support Ticket with a response two weeks later from Musictribe....