The most common drivetrain is a simple skid steer using 4-8 wheels, usually having the wheels near the middle be traction to prevent getting pushed and then having the wheels on the ends be Omni to make turning easier. Most common wattage is 44W bc it allows enough watts for other parts of the robot while also giving a strong drivetrain. There’s also other options like Meccanum, H drive, x drive
Overall I’d recommend using a 4 motor, 4 wheel skid steer as it’s incredibly easy to make
Ultimately though, make sure you’re designing it yourself and not using the forums to make your decisions