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My name is ***** ***** are your questions?
first..the thermostat with rc, rc, y, w, g...does rc and rh each have a separate to it?
and do you have boiler/radiator heat and ducted ac?
This is going to be a challenge. You have a 2 transformer system, zones, master thermostat and then secondary thermostats.
The 3 wire stats can only do the mode the mast thermostat is in...
Where you have heat/cool the jumper removes and rc and rh are separate.
The thermostat with B attached is feeding another thermostat via the B terminal.
Your 3 wire stats will need to be a standard 4 wire thermostat but you will only utilize 3.
I am afraid this type of project would require a complete drawing per zone or an onsite fact finding call.
Your system is the "perfect storm" of thermostat wiring...
Ok been looking it over.
Unfortunately this is not a quick one and would take a bit of time to draw out.
This means more likely tomorrow for info. I will open to all experts to see if someone can get started on it.