On a serious note, why are we going from Beir to Snow Belts depending on Berserk? And Gorgets too.
Don't see how the ftp modifier would be affected by Zerk... Maybe I'm too tired/out of FF mode.
I've been using Motenten's war spreadsheet for all of my numbers, but since i was extremely bored - i decided to math it out for you. In that process, i noticed that: if you have a gorget/ele belt on for either berserk up or down sets, it applies the ftp bonus to all WS regardless. So, when i would add beir and ravager's, it would gain the bonus from those stats AND the fTP bonus from the ele gorget/belt.
Redoing the math, it's clear the Elemental belt and gorget are better than Ravager's gorget and Beir +1, regardless if berserk is up or down.
VV/RR/AoA 293/281 STR, 1.9 cRatio, assumed 4.36 fTP with 30% DA and 15% TA, +48% crit damage.
(D + fSTR + WSC) * fTP * cRatio * crit damage bonus
beir+1+gorget: assuming 2% DA raises ftp by .014 from a base of 4.36
(131 + 22 + 148) * 4.374 * 1.9 * 1.48 = 3702.24
(131 + 22 + 142) * 4.56 * 1.9 * 1.48 = 3782.7
Unless I've made another mistake; apologies for the previous incorrect advice.
ps: snow belt doesn't work for ukko's