your soj is the only thing giving you fire skill damage, which is pointless unless you have like 40% or higher.
so get another soj and another item to add towards fire skills.
That fire skill damage would only be "pointless" if he decided to not use any fire skills. There isn't some sort of breakpoint for elemental damage where it changes from useless to amazing; it's always useful as long as you're using skills that take advantage of it.
Also, you can only equip one SoJ at a time (excluding legacy SoJs, although those don't have % elemental damage anyway).