At higher floors, your raw damage and raw health are irrelevant. Crushing Blow is the easier method to climb damage wise, as it deals damage proportional to the enemy’s HP. For defense, use dodge + sanctuary (I use smokebomb OH for guaranteed dodges).
use Amethyst to change Crystalline & Nadriji’s Sets to different Set affixes, or replace with Epic or Legend affixes instead.
change Timewarp Skill on the Bracer to Taunt (to Taunt enemies into your Storm AoE). a benefit for using Taunt is that you will have more enemies in the Storms AoE who are being affected by Poison Toxic.
change Astral Talent on Ring to Magnify Talent for more AoE for Storm & Taunt. Astral would be good on this build if you had All Resist of 3000 or more.
Storm has a knockback effect, which means Storm is knocking enemies out of much of the DMG being done by Toxic/Blight. I used Ice Element when I was using Storm. my Taunt moved enemies into Storm Range and enemies that are Freezed wont get knocked back, and they’ll take tons of DMG with Frostbiting.
it looks like the build as it is is nerfing Equality Set a lot. Equivalence Mythic will fix the problem or change Equality to something else.
Mirrorcast doesn’t work with Storm. there can only be one instance of Storm. a new Storm will cancel/replace the old Storm.
one Legend +400% Explosive affix would be good with an Ice Storm/Taunt build.
with Epiphany 5, get your Dodge to +70% or +75% and if you can, get Sanctuary Mythic on your Necklace/Amulet. these will help you survive more/die less.
what is your Power Stat? Empower 38 Talent will almost double the DMG you get from Power, so higher Power is lots more DMG.
Power 5 with Empower 40 = 750 DMG
Power 50 with Empower 40 = 7500 DMG
Power 100 with Empower 40 = 15,000 DMG