sounds right, but I would add: shacklebreaker and amberplasm are incredible sets for a slightly more forgiving playstyle and, in no-cp, very good for almost any playstyle. as a rule of tumb, you want to break out of nearly every hard cc (stun, fear, eclipse, etc) and you want enough sustain (stamina reg vs break free cost reduction from CP) to do so every 6s (because that's the imunity window).

on top of that, you sometimes also want to dodge to get out of roots and dodge/block key attacks like an assassins will proc. it is easy to dodge too often and very dangerius to block for several seconds quickly bruning through your stam and thus ending up with missing stamina. therefore you really got to develop a habit of calmly casting shields while under pressure and not falling in the trap of panic blocking.

that said, having more stamina reg helps a lot to mitigate any harm, done by imperfect play and thus the sets i mentioned earlier. once you're perfecting your playstyle, you can also choose to build harder on sustain and squeeze out some extra damage

I prefer to have at least 800 stam regen on a mag toon (I play in CP). Shacklebreaker, Amber Plasm, or Blood Spawn more or less gets you there. If not, I have also used a stam regen jewelry glyph in some builds.

A decent stamina pool also helps. 12K is about the minimum I like to use. There are several ways to go about this. I prefer to use all prismatic enchants on armor together with single-stat / regen food, e.g. Ghastly Eye Bowl. If you want more health, by all means use Witchmother's Potent Brew, but I prefer a minimum of health (20K to 21K), a bigger magicka pool for bigger shields, and the extra regen from Ghastly Eye Bowl. This approach typically nets you the ability to use a damage jewelry glyph, where you might otherwise have used a magicka recovery glyph, so it's more damage and bigger shields at the expense of health.

A friend of mine builds with Seducer and uses food instead of the single stat / regen drink. He's had good results with that approach, so my approach is not the only one. I would say that, in any case, building with all prismatic enchants is the way to go, as this gives you free stats you cannot otherwise get. This is why I like the single stat / regen drink, as Witchmother's may give you more health than you need. If necessary, use your attributes to balance health where you want it, don't automatically go 64 into magicka, like so many people do.

I historically - and still - use Immovability / Detect / Magicka potions, even though the immovability time was nerfed. My 800 stam regen recommendation is basically designed with those potions in mind. You can supplement this with poisons, specifically two types. There is a stamina cost increase / stamina return poison. The other one is the Escapist's poison, which grants you 4.4 seconds of hard CC immunity, when it fires. This can be augmented to 8.4 seconds by using the Assassin's Guile set, although I'm not sure that's a good fit for a sorc. Another option is to use a weapon enchant that returns stamina.

I have seen sorcs who would calmly sit through a CC, and could take the damage. I don't play sorc. In my experience with magblade and magden, this cannot be done, so I assume the sorc was shield stacking Hardened Ward and Dampen / Harness Magicka. He may also have been wearing Reactive Armor.

While sets like Reactive Armor are good for dealing with CC, the longer you play this game, the more you will look for damage. For light armor magicka builds, and sorcs in particular, I think stacking magicka is the way to go. You don't necessarily need to take it this far, but as an example consider 5x Shacklebreaker + 5x Necropotence + 1x Domihaus. With the right race, enchants, and skills, that combination will net you about 16K stamina and 50K+ magicka, resulting in large shields, high damage, and a decent stamina pool. Of course this involves running a pet.

You will be stunned at every available moment, if your build cannot gain enough resources to deal with this, then you must change your build.

Your build must use massive burst damage to kill (as a sorc) in today's meta GOOD LUCK

Plus CC is buggy af right now