^Would you really consider a Gear 2 assault to be "minor"? Heck, even Luffy himself acknowledged that Hyozou was a pretty tough customer after discovering that he was poisoned......
BTW, I kinda have an idea as to how Luffy will bring doom upon Merman Island: Luffy will accidentally destroy Big Mom's candy factory, which will bring about the empress' wrath due to having lost her source of favorite confectionary treats.
