Favorite Wave 4 two-pack?

Wave 4 figures are out now. Which of the new Wave 4 figure two-packs is your favorite?

Dart vs Cobra C.L.A.W.S.
Duke vs Dreadnok Ripper
Dusty vs Shock Viper
Heavy Duty vs Skullbuster
Shipwreck vs B.A.T.
Wild Bill vs Cobra Neo Viper

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