Health after FoV's charge:
Seraphic Helm + Ancient Plate Mail (fire weakness: high)
Black Kat Cowl + Ancient Plate Mail (fire weakness: medium?)
Fire deals more damage with BKC.
Health after 4 hits from fire:
Seraphic Helm + Ancient Plate Mail (fire weakness: high)
Black Kat Cowl + Silvermail (UV Fire Low) (fire weakness: low?)
Fire deals same damage.
And, to clarify, you're bringing this up because the statistics bars on Black Kat Cowl show fire having a -2 penalty, not a -4 penalty?
If this is true, then it would be nice to know. I'd like to have cleaner comparisons, and more data. How many times have you run these tests? Do they always produce the same result? (I'm not an expert on fire.) What about Seraphic+Silvermail? Can we get some 5-star armors in there?