Some people that don't consider Sanji a top fighter (only below the 5 rooftop SN and Marco among the alliance) are forgetting one important thing:
*Sanji's mid-saga opponent was hybrid Page One, and he toyed with him while testing the raid suit for the first time*
So a Tobiroppo level opponent, which is in the same tier of the final opponents of people like Jimbei, Shogun Franky and Robin in this Wano saga, was like a warm-up fight. AND he was in hybrid, at full power.
It's similar to Whole Cake Luffy's situation, where he had Cracker as the mid-fight and Katakuri as the main fight of the arc.
So it's silly to not consider RS Sanji *at least* YC3 level (probably higher if his final opponent will be either Queen or King).
Stop messing around with our flaming cook, guys.