Alright, I'll experiment with just the DHP first.

I was trying to predict if I would need 2 heat sources mainly because that way I'd buy a multichannel thermostat instead of buying a normal thermostat, then realizing I'd need a 2nd heat source, and having to buy another one. The price would be nearly the same and the multichannel one has more features, but at the same time if I only end up needing the DHP then I'd be wasting money by buying it.

Another question tho, in case the DHP isn't enough, would the CHE be put on the colder side?