aren’t you using Skull Shield as your monster killing machine? maybe take off the +5k WD on the OH and put on another High Voltage. or put a +400% Explosive there instead. this will give your Skull Shield some AoE, which is more damage/DPS. (each explosion from Explosive causes each monster in the AoE to also have a 5% chance to have an Explosion). Explosive does MH damage.
Attack speed & Cool Down don’t really work on Skull Shield. CD only lets you cast SS faster, but that pauses the spell while casting, and you don’t want it to stop shooting.
if your Dodge isn’t at 60, replace +20% shock with +10% Dodge. more defense and more damage from Pathfinder.
for Natures, 2 Death to max Crit Chance to +60. with Rage Set, this should get you closer to the Crit Damage +350% cap. if not, put enough Strength Nature so you do reach cap.
not sure of the math, so I don’t know if this is a good idea, but if you replace the Push the Limit on the Ring with +10 Prismatic or +10 Empower…
with the extra Empower, you are getting about 1800 extra damage from Power Stat, and that gets boosted by everything (IQ, WD%, & ED%, then everything else). so more damage than having 2 PtL.
with the Prismatic, 25% chance for attacks to be a different element. when you cast Skull Shield, it has as 25% chance to be another Element. just keep casting until it’s Shock. Explosive is the same Element as the attack that caused it, even with Prismatic. when you go up against mobs or bosses, use your MH Skills to cast spells. for each Element DoT on an enemy, your Skull Shield will do +40% damage from Amplify. so if your Pierce Skill can get 1-3 of the other Elements, your damage becomes +80%, +120%, or +160%, instead of only +40% with just Shock.