Not dumber than baking a cake shit and did nothing. More dumber plan is thinking that he can save Luffy by going through sky...lol...so much for genius tactician Mr. Hunter Sanji.
Hunter became prey
Also, Luffy saw BigMom in island while he escaped from Katakuri with Brulee and he thought crew escaped. Anyways they planed to meet at Cacao island at 1pm again because of dumb ass Sanji said he was going to bake a cake.
Don't be blinded by your hatred towards Luffy because he got to fought Katakuri instead of Mr. Dumb ass loser