I do not know why Luffy, Zoro and Sanji are just playing around.
Luffy should be using Adv CoC Sky split+ Adv CoA Emisson+ Adv CoA Internal Destruciton in base mode(no gears), to destroy the seraphim in one hit.
Zoro should be using King of hell mode( Adv CoC+Adv Coa EMisson) to take out them.
Sanji shouldb using Ifrit Jumble.
Luffy should be using Adv CoC Sky split+ Adv CoA Emisson+ Adv CoA Internal Destruciton in base mode(no gears), to destroy the seraphim in one hit.
Zoro should be using King of hell mode( Adv CoC+Adv Coa EMisson) to take out them.
Sanji shouldb using Ifrit Jumble.