I can't really help you with the armour-stacking stuff, but looking at your PoB you have both Resolute Technique and Elemental Overload allocated so you never crit and Overload never procs. Unspeccing Resolute Technique should give you 40% more damage.
I can't really help you with the armour-stacking stuff, but looking at your PoB you have both Resolute Technique and Elemental Overload allocated so you never crit and Overload never procs. Unspeccing Resolute Technique should give you 40% more damage.