NOTE:
All of the rare gear in this build is just an example. You do NOT need to get gear exactly like mine,
These are example stats of what you want. Most armour gear will want some combination of life, resistances, str/int, and armour/ES
From the lab after Act 3 onward try to get ice nova of frostbolts and/or frostblink of wintry blast. Or if you get another good gem that you can sell and trade for ice nova of frostbolts, do that. It will help your single target damage immensely.
CAMPAIGN:
ACT 1:
Use frostbolt or freezing pulse as your main damage skill. I usually link volley + arcane surge. Can also do added cold + arcane surge.
You can link frostblink to added cold damage for clearing on the go
also set up shield charge + faster attacks + momentum (if you muled a ranger)
basic skill rotation is frost bomb > holy flame totem > frostbolt/freezing pulse
You get ice nova after the cavern of wrath waypoint. You can swap to this immediately if you want, but I usually level it in an offhand and swap to it later
Gems to obtain:
Frostbolt
Frost Bomb
Volley
Arcane Surge
Shield Charge
Faster Attacks
Momentum (if you muled a ranger)
Ice Nova
Frostblink
Clarity
holy flame totem
ACT 2:
Use the corruption altar on cold snap. If you get Vaal cold snap, you can either use it throughout the campaign, or sell it to get ice nova of frostbolts.
I generally use cold snap as my main damage skill here along with frostbolt. You can also use ice nova if you wish, but it's pretty bad early. Freezing pulse is another potentially good option.
For bosses, hit them with cold snap and then spam another damage skill until the cooldown is back on cold snap.
I also drop holy flame totem here.
Gems to obtain:
Herald of Ice
Cold Snap
Increased Critical Damage
Controlled Destruction
Power Charge on Critical
Faster Casting
Tempest Shield (If you're going to use a wand/shield combo)
Mana reservation for act 2:
Clarity
Herald of Ice
ACT 3:
Grab Zealotry and start leveling it. Don't turn it on until you have some mana reservation either from the mana mastery or the mana reservation nodes
Level discipline, automation, and ele weakness in offhand
Gems to obtain:
Zealotry
Discipline
Frostbite
Elemental Weakness
Automation
ACT 4:
Try to get ice nova of frostbolts if at all possible before malachai. It makes the fight a lot easier. But it's not required by any means.
If you're low on sockets/links, you can drop returning proj and faster casting in frostbolt, as well as momentum on shield charge. You can also drop cruelty and controlled destruction on cold snap
Ideal Ice Nova of Frostbolt links are arcane surge + spell echo + power charge on crit
Also set up arcanist brand here. Should be linked to Frostbite + Frost Bomb + Elemental Weakness (after getting Whispers of Doom notable on the passive tree)
Sometime during this act is when you'll get the charge mastery for increased duration. Big QoL for keeping your power and frenzy charges.
Gems to obtain:
Bonechill
Spell Echo
Arcanist Brand
Returning Proj
PSA: Don't link support gems to herald of ice
ACT 5:
Try to get your resistances ready for the -30% you get from Kitava. Nothing else new this act.
ACT 6:
Level these in offhand:
determination
molten shell
automation
discipline
Inspiration (this will be your 6th link)
Increased Critical Damage
Start working on gem links and aura set ups over the next few acts:
Ice Nova of Frostbolts > Spell Echo > Power Charge on Crit > Arcane Surge > Increased Critical Damage
Frost Bolt > Volley > Returning Proj (or slower proj) > Faster Casting
Molten Shell > Automation
Shield Charge > Faster Attacks > Momentum
Arcanist Brand > Frostbite > Frost Bomb > Elemental Weakness
Vaal Cold Snap > Bonechill
Herald of Ice
Zealotry
Clarity
Frostblink
/CAMPAIGN
EARLY MAPS
Early maps staff:
Patch notes say that lower tiers of + to spells will be much more common, and that high cast speed weighting is the same as low cast speed. So crafting this should be much easier to do now.
We'll need some kingsmarch dust for recombinating. I like to turn on the option for my filters in Filterblade to show all dust uniques and then dust those. Or you can buy some high dust uniques.
Then we need a bunch of staff bases. We'll either need a loot filter to show all eclipse and/or imperial staves, or just buy a bunch of bases
Then we alt spam for + to cold spells and + to all spells. Augment, and then regal, and then craft a random suffix on each staff
Then use the unpredictable recombinator to slam em together. It may take a few attempts, but it should give us our staff. Then we just craft cast speed or spell damage on it and go crazy.
Or if you're feeling extra saucy, you can lock the prefixes with the crafting bench, and then reforge caster at the harvest bench to try and hit high cast speed
And even better, if there is an open suffix, you can use the league mechanic to hit it with a shaper exalt and try to hit +1 power charges
OR
You can just buy a Taryn's Shiver. This should be almost as good as whatever scuffed staff we recombine in early maps. But we'll still want to build up our staff supply and recomb dust for the endgame staff.
Try to get exposure on hit on your gloves and a mark of submission ASAP so you can drop the arcanist brand setup
You may need to swap inspiration in as your 5th link if you don't have enough mana regen to sustain your ice nova of frostbolts. Try and craft mana efficiency on rings and get it elsewhere, otherwise swap in inspiration. Or you can use a mana flask. But I hate mana flasks
LATE MAPS/ENDGAME
I'm expecting power charge ralakesh boots to be 20+ div for the first week or more, since so many people are starting winter orb. And so many people fail to recognize just how much power you can get out of a staff now. It's way better than the power
charge stacking unique wands and shield, in my opinion. And if you remove things that eat your charges from the equation, then you either don't need the boots, or you can use Inner Conviction alongside frenzy charge stacking to really juice your damage.
I'm including
MISC NOTES:
the level of greater multiple proj and returning proj don't really matter, since we don't care much about frostbolt damage. It's just a delivery vehicle for our novas. So if you don't have enough Dex for em, don't level em
Bonechill helps your single target quite a lot early on, which is why we try and link it to both cold snap and frostblink. And if there is an extra link, unbound ailments pushes the damage just a lil further. But we're pretty socket starved, so that's probably not happening
SOLVING MANA PROBLEMS
First thing should be the 2 mana masteries we grab on the passive tree
Next is Clarity. Level it up as much as you can while still having enough mana to cast
Next up is -mana on rings or mana efficiency
We can also do mana reservation efficiency with an essence craft on either our helmet or chest, if we're not using a unique helm or a giga sacred chainmail yet.
mana flask is also an appropriate answer. Get one where the effect isn't removed when your mana is full
Mana regen tattoos
Aura effect