Shelly Pro 4PM or Shelly Plus i4

My electricians have pulled back wires to a central location so I can install Shelly Pros, but as it turns out 5 of the circuits are now redundant (2x LEDs being driven instead by mains sockets and 3x blinds to be battery powered).

What's the best idea, still get Shelly Pros for them and run them in detached switch mode? Do I just not connect those wires that will not be running anything?

Or get 2 Shelly i4s perhaps? Fair bit cheaper than buying a Pro 4 if the relays are not going to be used.

Can I (my electrician) wire the inputs from 4 separate light switches to a shelly i4?

OK. Great. Just single phase in this house.

So do they need to wire the neutral from the supply wire in the switch to a bus in the cabinet?

When you say circuit breaker, do I have an issue if we have two consumer units? One main one, one sub unit.