Type of winding for max magnetic flux?

[magnutguy]

I am just curious (for now) but all other things equal which type of winding, conventional, bifilar or caduceus offers the most flux per watt? Where does one find such data?

 

[VEBill]

Magnetic flux is proportional to current (amps), not power (watts). To provide best flux per watt, minimize the voltage drop.