Finally semi-immortal... what now?

Hello community,

I finally reached my goal to „not die anymore“ and become semi-immortal to everything T16 maps have to offer except occasional one-shots. The build follows my goal of simple play, so throughout normal mapping I am mostly cycling on left mouse button and throwing a curse from time to time on tougher mobs. While it feels really smooth and I can finally play semi-afk without dying all the time, I am a little clueless what to optimize further (next to some better rolls on my jewels). I invested around 25div so far, but I found the helmet & scepter, which will probably cost another 10 or more div if you would buy them.

My defensive layers are:

• High physical to elemental damage taken with Lightning Coil (50%) + Watchers Eye (12%) + Helmet (8%)
• 6 Endurance Charges (30% dmg reduction)
• Iron Reflexes based armor stacking (150k with flasks)
• Resistances: 83%/84%/84%/80%
• Bloodnotch & Immutable Force
• Ailment Immune (Purity)
• High Life regen of > 1000 HP/s
• Always Moving (Cyclone + life gain on hit)

Total eHP: 403,330

https://pobb.in/EipLYR1najut

I can tank nearly everything map related, even these annoying lighting mirror images, poison, bleed, degenerating ground or the crystals don’t affect the build. Most times my life bar does not even move at all (with this build it starts to feel strange if I loose even small amounts of live). Damage is on the lower end with only about 1m dps though.

So far so good, but I am hitting a wall here. I am not sure how to further optimize this build and would love to hear some thoughts what I could aim for. I would also be open to switch to a setup with more damage than RF + Fire Trap, but I didn’t manage to find anything reliable that would significant increase dmg without lowering my defenses.

All creative ideas welcome.