I don't think beating him is that simple
And i doubt there is anything hotter than Ifrit Jambe other than Akainu's magma currently (on the other hand, Ifrit Jambe has other properties, such as electricity or something likely, that somehow makes Sanji even faster)
I don't see Sanji fighting a giant freaking monster like Aramaki, unless he has some kind of "hybrid form", and he has a black blade as well.
So having flames might help, but Sanji would need much more than that, fighting an Admiral can't be that simple.
Who else would be able to counter Queen's invisibility so perfectly other than maybe Luffy? Or managing to come out of Queen's Brachiochoil looking "fine"? Fighting Sanji's enemies usually requires more than simply hitting harder.
Oda literally showed us how even Kaido's Blast Breath, coming out of Momonosuke, is completely irrelevant to Aramaki, who is a Logia (i don't think people actually realized yet he is a Logia, for real)
But overall, i agree that Sanji vs Aramaki and Sanji vs Kizaru both have equally good foreshadowings