This is overwhelming. Let's do this, let's minimize the Gorosei, what level will they have? Underestimating them, would they have a level close to admirals? That is to say, Luffy has not been able to harm Saturn, and we know or infer that he could defeat a YC1 without many problems currently. So, there are 5 guys with a level, at least, close to an admiral on the island and an admiral. This is absolute madness. I think these guys are as strong as Sengoku Marineford which is crazy. and luffy only has zoro, sanji and jinbe. and droggy and borry and this is minimizing, they could easily be equal to or stronger than an average admiral. Sanji's order points to that, the observation haki allows you to know the level of your opponent, that is why he orders them to leave the island without waiting for Luffy, Zoro and himself. Someone has to arrive, the giants, until further notice, are not strong enough to tip the balance or equalize it.