Oh fair.
I didnt expect Sanji to be able to go against a Calamity prior to a PU (RS, in this case). But he used a Flying 6 as a test dummy for it.
Tested its power, durability, gimmick. But he's still learning its limits. The best way to do it is fighting more powerful enemies. After the Flying 6, a Calamity is the next step.
That being said, if people here are discussing whether Sanji is being "carried" by the suit or not, then I don't care about it.
It's just a Saint Seya Armor, or a Power Ranger Suit, or whatever. Not a Pokemon that fights for him anyway.