You probably have done some of these things Bud as you are not a stranger to the Fractal stuff.
For me what I have found with the dynacabs is that I run 2 ribbon mics. The regular 57/121 is not my favourite in this case as we are dealing with a virtual cab and not the real thing. I've found the 2 ribbon mics to give me the beef I need for FOH without moving into the bass player's territory.
Also, with the "Cab More" tab, I have pulled down some of that high end and put my low cut at 120hz.
Aligning the cabs a bit more with the align tab has also made a small difference.
I'm monitoring on stage with either 1 or 2 EV-PXMs which are the first monitor that I have actually really enjoyed using live! I pull a very slight bit of high end out of them with the DSP built into the units.