The raid will fail, thats how japanese plays go. The 3rd act is a tragedy, the 4th act the heroes regroup and lick their wounds and the 5th act is the climax, the marines are gonna get involved as well as blackbeard at the bare minimum. If you really think that luffy and his band of merry lads and some wb commanders are gonna be able to deal with 2 yonko crews when the whole marines were mobilized to deal with old and sick wb then you are completely dellusional. No matter how strong luffy got which is not enough.