PC on Fiery Desolation Sword of Fortitude

Fire dmg: 15-22 (req.10)
Health +29
Inscription "Strength and Honor"
Dmg 15%^50

I saw on the rare weapons guide that the desolation sword (req.10) was 10-20k but how much would it be with the mods on it?

thanks in advance.

bumpity-bump