That’s because you don’t heed the suggestions given to you already.
Once again:
‘Gain % Ward for missing health’ Affix. Either chest or Gloves (Gloves are Experimental Affix). Strongest Ward generation possible with Health stacking. Otherwise why stack health in the first place as a Mage?
Crit Reduction is key! 24% is absolutely unreliable and far too little. You’re using a Catalyst, so use ‘Mental Catalysis’ in your Runemaster tree. Gives another 36%.
Are you focusing crit or not? Depending on that ‘Inscribed Instruments’ is a reliable option. If not then go for Scepters and get the extra War retention, 72% is nothing to scoff at.
Add ‘Spell Slinger’, it gives generic ‘Spell damage’ and hence applies to Cold, Lightning and Fire. Triple reward for a point with elemental Nova.
Add the last 3 points into ‘Sphere of Protection’, 3% DR is 3% DR, massive, always. DR is the most important method of defense since it works against everything.
Total needed points hence: 20.
Since you now have not enough point the following can be removed (give you go into the ward for missing health affix): ‘Transcendence’… kinda useless. ‘Chill to the Bone’, if you go into ward for missing health leech is a death-sentence, the penetration is not that important comparatively. ‘Arcane Insight’, at 100 Int it’s 500 threshold… which is basically nothing. Not worth it. 500 Threshold gives you… 500 more stable Ward, higher Health for more generation does a lot better. ‘Freezing Point’ gives you what? 200% freeze rate? That’s nothing, remove that, absolutely not worth it. 7 Points.
That opens up 26 Points.
6 points more then needed. Use those 6 for ‘Elemental Affinity’ in the Spellblade tree, that’s 18% ele res, you’re lacking fire and lightning res anyway. Also 55% ele damage, which once more… works triple since you use elemental nova.
Now to elemental Nova directly:
Are you direct casting or triggering through Frost Claw? I imagine triggering, so direct cast is useless for you, you always wanna do Ice Claw attacks hence. Focus on that hence.
If you actually wanna go into crit then use ‘Charged Destruction’. You can imagine crit-chance without crit multi as a 2% more damage multiplier beyond the ‘more’ multiplier since it’s multiplicative with that one. Far better then pure ‘more’ multipliers. That means each point is a 6% more multiplier at least.
So that means you need ‘Fiery Destruction’ too, giving 1,4% more per base crit. So each % crit is a 3,4% more damage then through that alone. Those 7 points provide at least 38% damage. (5 base + 1 from lightning nova + 9 from the extra base.). To get those 7 points remove ‘Spark Charges’ (5) and 3 in ‘Melting Nova’ since converting the shred chance is actually detrimental. Leaves you 1 extra point so you can put it into ‘Elemental Expanse’ to actually reach ‘Charged Destruction’.
Next up, Ice Barrage. You’re using that as a support skill with cooldown anyway. It’s not a permanent thing, it’s something to boost you hence. Means ‘Biting Cold’ is not really good. You can either put it into ‘Frigid Doom’ for more small freezing hits which causes enemies to do less damage through chill… or even better remove ‘Intensifying Cold’ too. 4 points free, 2 into ‘Frigid Barrage’ and 2 into ‘Subthermal Velocity’ for more supporting action.
Frostclaw: Remove ‘A Crack in the Ice’ to reduce mana cost a bit, instead go into ‘Brightfrost’ since you wanna cast it often for Nova. ‘Kolheim Ballista’ is also not really good since your Barrage is a support… you don’t wanna support Barrage but supported by it. Hence that point can go into ‘Rending Cascade’ for a bit of extra chance to actually chill.
Teleport: Your core damage skill is Elemental Nova, Teleport focuses in a branch specifically on using that. Also Mana tunnel is really detrimental for mobility, hence removing all those points there (10) can be used to go into ‘Resonant Plasma’ to ‘Elemental Affinity’ and further into the 3 Nova points. Minimum cost is 8. The last 2 can be used for ‘Flicker’.
If you wanna optimize it a bit further then remove ‘Time Dilation’ and instead go into ‘Flicker’ fully followed by ‘Wormhole’ to allow Teleport to be up even faster again, also it helps with barrage a bit to keep it up a bit more reliably.
I don’t quite know why you’re going into DoT damage as a focus given you’ve got elemental Nova as your core skill rather then direct damage. Already your Nova has a DPS potential of over 100k… mind you, Frostbite does 50 per stack and scales from there, the only multiplier you have is global Cold which does give it 60%, hence 80 base damage per stack. 15 stacks max means 1200 base at max potential and from there the % inc scales.
It’s really low actually.
Your build would do much more damage if focused on direct nova damage or a full built into ice barrage by removing the ice shield. Whichever you prefer. In that case you would use Glacier though for the Ice Vortex chance to create those and scale DoT off them.
You kinda got a weird mish-mash of half-working stuff.
So you gotta decide if that specific build with Frost nova should be your focus… or actual DoT focus with Glacier and Ice barrage for defense and ongoing damage. The mix is mediocre at best.
If you switch to direct damage then obviously the ‘Frostbite shackles’ can go, if not then at least focus on getting the experimental Affix on them rather then freeze multi.
Overall if you go direct damage you can fix up your defenses massively. Transient Rest for using your mana better to get some extra Ward, Eternal Gauntlets for more Armor and better DoT defenses. And since you can switch out your catalyst then you can actually put crit multi and ele damage on it, potentially fixing your res and saving up some points in the passive tree and even get more damage on your wand instead of the current setup.
If you wanna go freeze then switch from elemental Nova to Glacier and use ‘Age of Vengeance’ in your frost claw tree to enhance that. Glacier for scaling DoT damage, freeze rate multi, getting ice vortexes, ‘Perma Frost’ for more freeze and even moving into ‘Frost Blink’ potentially for a secondary movement skill making you basically a flickering mage which is always away from danger.