on your Winter’s Visage of Luck, change the Mirror Image Proc to Frostbiting.
with your Power Stat at 88+ and Empower 40, you should trade your Eternal Wand for a Legend Aether Spark, and take the Epic +5000 Fire off and replace it with +100% WD.
as an example, if your wand does 1000 damage before Power Stat…
Eternal Wand:
(((1000 + 13,200) x 1.5 x 1.75) + 9306) x 3.914 = 182,318
Legend Wand:
((1000 + 13,200) x 1.25 x 2.75) x 3.914 = 191,052.
since you have Inferno Set and Fester 40, you should get your Sorcery to 40. the reason is that Inferno (5) and Fester 40 is giving you 3 Fire Dot a second for 4 seconds. Sorcery 40 increases your Fire DoT by +200% damage.
your Storm is doing 9.5 million per hit. Fire DoT is 3.8 million times 3 from Sorcery for Fire DoT 11.4 million times 3 from Fester 40 for 34.2 million DPS. with Frostbiting +200%, your Storm is doing 9.5 x 3 = 28.5 million. your Fire DoT would be based on that number instead. and then your Immolate damage would be based on the higher DoT damage, so higher Immolate, and Blistering would cause higher Bleed Damage because of the higher Fire DoT damage also.
if you are doing the Taunt & Storm, and not using Barrage, going to a Legend Wand means you can get rid of the +4 multi Attack, move an Epic affix from one of the other Items to your Wand, and put a Glass Cannon on the other Item so you still have the +100% GC. also, the damage you lose from the Push the Limit for a Legend Wand would be made up with the second Frostbiting.
if you think about it, your Storm 40 is doing 8 Attacks a second and the Fire DoT is 3 attacks a second. with a higher Sorcery and lower Focus, you should be doing a lot better with your DPS.
and with enemies Freezed with Frostbiting +200%, each of your Storms Attacks are doing 3x damage. and when your enemies HP gets to 25% or lower, 2x damage from Demonic and 1.914x damage from Execute. so that extra Frostbiting will really help. unfortunately, Frostbiting doesn’t affect the damage of Crushing Blow or Crushing Flames.
Welcome to DQ Forums @Tuan113 ! hope this helps a little. and if I missed anything, hopefully, we can figure it out later.