Help With Current Build

Hello,

My build is definitely off-meta, and was wondering if I could get some help to improve it.

I've replicated the build in path of building, but there's still some bugs to work out with the builder or maybe user error, but here's the build:

https://maxroll.gg/poe2/pob/2k28t0yo

Here are my core stats:
HP: 3303
Armour: 6422 (63%)
Evasion: 6158 (66%)
Fire resistance: 79%
Cold resistance: 77%
Lightning resistance: 80%
Chaos resistance: 75%

Main attack is molten blast (I basicly just spam that).
16,553.7 DPS

I'm cruising through T15 maps, the citadel bosses take a while. Level 92 Gemling Legionaire.

Here are some general questions I have:
1. Does accuracy help molten blast? I've tried with and without accuracy and didn't notice a difference.
2. Anything major I'm missing that could help with survivability?
3. Anything major I'm missing that could help with damage?
4. I found a relic that redirects physical damage to fire damage. Thoughts on stacking evasion and fire resistances (I could probably hit 82% or so fire resists as a gemling lengionaire).

I've tried setting up my character so I never get 1 shot by bosses (and have been successful), and with the rest of my points I've tried to pump damage.

The original concept for my character is I wanted a character that was melee and ranged, but this didn't work out. I ended up liking molten blast better then grenade or x-bow mercenary attacks for ranged, and don't like the melee mace abilities. When great axes are released I'm planning on trying a hybrid dual wield 2h axes for melee and dual wield 2h maces for my ranged attacks.