With a conventional turbofan (or basically gas-anything) the bigger it is the more efficiency gains can be realised. So I'd expect that conventional jets would

With a conventional turbofan (or basically gas-anything) the bigger it is the more efficiency gains can be realised. So I'd expect that conventional jets would really ideally have just one engine, and they typically have 2 or 4 for reasons of fault tolerance and isolating noise from the fuselage. None of this applies with electric, particularly a cleansheet design.