You're probably wondering why Golduck is this high when Floatzel is superior. Golduck can run Rain Dance easier than Floatzel thanks to its much better bulk and it's also a good bit stronger than Floatzel so it has those advantages. They share the same coverage in Hydro Pump, Ice Beam and Focus Blast. Golduck can afford to go Modest to boost its power even more since it outspeeds every scarfer in the tier anyway under rain.