I hav 301000 attk and 299000 def which is higher than some others rank but they are still higher ranked than me
Also lands play a factor, I remember one of my alts was like 600k CS more than a guy, and better allies, but he had like 10 more lands, so he was above me.
BFA only makes a difference when you own a few HLBCs...the primary difference-makers in nearly tied people are land amount, and fights won.
Does the person above you have higher spy stats ? Spy stats count higher in clan rank then similar size attack stats.