That might work or it could back fire and now their will be a super fire resangen tornado heading towards him. The FRS is a powerful wind base jutsu unless their is fire jutsu as powerful it would work but Naruto could only use the FRS fully in sage mode which in makes the jutsu even more power, it may actually be higher than S. put some oil on that fire and it should turn the FRS into dust.
yh a FRS in SM is definately atleast a S rank if it hits anyone they die almost instantly (unless they have a deefnse of some sort)
yh the oil thing may work but i dont know where its gonna come from