Hitting a wall with my molten strike build?

I haven't run into problems until I hit level 80 and started Normal atziri and t10+ map bosses.

My hp is at a decent amount (4.8k) and my damage is well more then enough for bosses (roughly 45-65k)
my Fire an cold res is capped, my lightning res is only 10% off.

I have been scouring my build to find anything I can change but so far haven't been able to spot anything to terrible. so I ask anyone who may be able to help me figure something out that i may be doing wrong to better improve my gameplay/Build. any advice is appreciated.

4.8k life is not a decent amount for t10 maps.
Get 70+ life on every piece of gear that has less than that (amulet and rings).

Don't scale the melee damage of molten strike (melee phys support), scale the projectile damage (added fire/conc effect). You have way more projectiles than melee attacks, so why would you use that gem?

Socket a murderous jewel into your gloves for "intimidate". Swap with the one in the boots.
Or: get jewels that actually do stuff:
flat life, added fire to attacks, (sword) attack speed

Vendor your flask "Sorrow of the divine". Get a basalt flask instead.

Get "Elemental Overload" in the skilltree, you have no crit multi anyways, and that's 40% more total damage.

Get a 6L chest.

Not sure the boots do you much good. I'd rather wear Kaom's Roots.

Ideally you get full conversion to fire.
Xoph's Blood is the expensive version.
Avatar of Fire in the skilltree costs skillpoints, but "it's for free".