Pretty sure that Aube is for radiant heated floors, I have 2 (rebranded as NuHeat). Not sure if a floor temp probe would be appropriate, but I think it can sense ambient as well.
I would get the heater manual, read it closely, and then call Aube Tech Support. Aube makes many different thermostats, and at least 1 would work. But 8 would be pricey.
IIRC, I couldn't find many details on my NuHeat/Aube thermostats, in terms of contact functionality. Maybe Aube can provide more details on that.
Also, any bathroom/kitchen/basement heaters will probably need to be on GFCI breakers - although I think some thermostats provide that functionality, eliminating the need for a GFCI breaker.
I would suggest posting in the Elk Cocoontech subforum - but I see you've already done that.