Oda is a friends with toriko writer
Sanji has always peppered cooking references into his fights so him getting long ranger (sanji not having long range options will mean during zoro and sanjis fight he would be forced to come in to attack so it evens out sanjis far superior superior speed and mobility )
that’s comparable to
Meteor spice (obviously downscaled )
Where he launched fire balls like a spice down
Or using fire force shinra (who has a fire ability called devils footprint fitting sanjis devil association )
His fire feet allowed for speed and mobility and he evolved that ability and gained new moves by manipulating his chakras (with handsign to focus energy in his feet
Imagine him increasing his speed by him emitting fire like a jet
Or fire ranmyaku
Or him manipulating fire around him a fire version of fishman judo/karate
Sanji has always peppered cooking references into his fights so him getting long ranger (sanji not having long range options will mean during zoro and sanjis fight he would be forced to come in to attack so it evens out sanjis far superior superior speed and mobility )
that’s comparable to
Meteor spice (obviously downscaled )
Where he launched fire balls like a spice down
Or using fire force shinra (who has a fire ability called devils footprint fitting sanjis devil association )
His fire feet allowed for speed and mobility and he evolved that ability and gained new moves by manipulating his chakras (with handsign to focus energy in his feet
He focused the fire to be like a jet flame precise and focused to increase his speed and when powered up he moved faster then light and time traveled (this won’t be happening but it is fun to imagine
Or fire ranmyaku
Or him manipulating fire around him a fire version of fishman judo/karate