TLDR Fix mana and barrier generation via defensive spells. If this isn’t done the class will lack diversity and if you decide to come back and fix it later you are going to have double the work to fix all the balance changes that you are making now.
There are 2 big issues that cause massive issue with sorc and the recent chat and the proposed changes do little to nothing to fix it.
Mana: Most sorc builds struggle massively with mana. This is largely because other than a legendary aspect there aren’t good ways to restore mana and we’re force to wait on regen (which is very very low) to cast very high cost spells. Some builds at a high enough gear level can get sufficient mana cost reduction and mana generation to drop the legendary aspect but most cannot. The lack of mana also means we can’t really effectively use attack speed in most builds to scale damage. And the biggest problem here is that legendary aspect is one of 2 critical reasons that lead into the second problem…
4 Defensive spells are a must: Oddly enough survivability isn’t really the reason we use 4 defensive spells. Necro’s are super squishy and they usually run 1-2… sometimes no defensive spells at all. The first reason we use 4 is because of the Prodigy’s aspect which gives us sufficient mana to actually play the game. The second reason is the passive “Protection” which gives barrier on defensive spell use. Having barrier is a key scaling method for damage.
These 2 major issues have to be addressed or the class is always going to feel bad to play and lack diversity.
So how do we fix this?
Mana: This could be tackled in a few different ways but the easiest would probably global reduction in spell cost and a bit of a boost to base regen. When you compare to the other similar spell caster in Necro lets look at some numbers:
Fireball: 35 mana cost, 84% damage, 25% crit damage
Bone Spear: 25 mana cost, 244% damage, 5% crit chance, pierces, +vuln (this is before the legendary aspects and passives that push it too the moon).
Now you’re probably thinking bone spear is just broken… well yea so here’s another
Sever: 20 mana cost, 158% damage, pierces, +vuln (and shadowblight damage)
Out of the sorc skills probably ice shards (there is also a case to be made for glacial aspect but we’re dealing with base skills not rare aspects I still haven’t bloody found one of >_<)
Shards: 30 mana cost, 219% damage vs frozen(requires barrier vs bosses)
At the very least with reduced cost and better regen we could use attack speed as another avenue of scaling.
Defensive spell usage: This one is pretty easy provided you solve the mana issues. Take the protection passive and change it to just convert a % of damage into barrier. You already have the tech in Ice Armor and plenty of other classes leech damage as life so just having as leech damage as barrier solves the barrier issue well enough. Provided mana is solved this would probably drop people down to 2-3. Teleport which is hard to get rid of since it’s mobility and triggers raiment. Frost nova because of vuln; giving vuln to other skills could have people drop it (or just continuing nerfing vuln so much it’s not worth). Flame shield because unstoppable is a must at higher levels although even this could be dropped when playing lower tier content and if they changed the ridiculous amounts of CC it could be dropped in high tier stuff too.