Move smart valves to a different relay

Hello

I have a setup with several smart valves connected to a relay. Then I extended my setup  with a smart thermostat connected to my boiler that uses a second relay.

The question is how would this setup be optimized? Would it make sense to connect smart valves to the same relay with the thermostat? If yes, I could I smoothly move the smart valves from one relay to another?

Would it make sense? Is there any correlation between the smart valves and the smart thermostat?

I appreciate your feedback. 

Thanks