Core Commander set
Wear 2 or 3 of them for the bonus below.
Area level: CrystalEpic3 pieces
Pieces
Set bonus
Aura Apply Damage Increasewith 2 pieces
Aura Apply Radioactive Damage Over Timewith 3 pieces
CoreKeeper WikiBuild 1.3.0.6-6e73
Wear 2 or 3 of them for the bonus below.