Played the new fire DE conduit with this Oppressor. Surprisingly good gameplay overall. DE has indeed reached the promised land of a good, versatile skill. And its main mod item, gloves, is in a good place, too.
The build is plenty fast but sometimes drops in tank by a lot. Main reason is you need several suboptimal gear choices for the DE skill line, and the build ends up on a lower end of DA. It has high OA shred but the initial impact from enemy hits can be harsh. Also you need to take Necro belt and Ilgor medal with some specific affixed to cover your DE line and CC res needs, so the build becomes pricey.
I suggest adding a bit of DE line bonuses on gear. There was a good suggestion by @mad_lee to add +2 DE to Combustion band, which supports 3 dmg types at the same time. The ring has bonus to Infernal Purge which is excessive with FoI bonus already on the ring (and overall fire FoI support is immense). So maybe that one is a good target for replacement.
In support of this, here are two calcs of phys and chaos DE builds that would really benefit from this change and become some middle of the road but interesting builds for their dmg types:
(might be a skill issue)