The release notes say that Banishing Fists doesn't deal the extra 4d6 damage, which is understandable since that + a set of Banishing Handwraps would be +8d6 extra damage, which would be overpowered.
And I know if the mob is under 1000 hp, and you roll a Vorpal Strike, its dead, regardless if you are using both the outfit + handwraps.
But, if you roll a Vorpal Strike, and the mob is over 1000 hit points, will it take 100 damage or 200 if you use both the outfit and a set of handwraps at the same time?