Well. I'm not quite V14 on my stamina build but I can tell you the extra 570 weapon damage from my gear set at v9 dragonknight is very noticeable. What is Alot at v14? In total I'm not sure, but I'm sure someone can chime in. Since my minor 570 increase is very noticeable I would not expect it to be too high.
Aim for 4k weapon and 3k spell. You will need to be v12-14 area to hit this more than likely. It will be a mixture of gear and self buffs such as Major Brutality and Sorcery etc. To be quite honest, you can sacrifice Weapon Damage and keep it in between 2-3k and do just fine. I know plenty of people who do this to trade with Stamina Regen. As for Spell Damage, I personally won't settle for less than 2800. 3k+ is really good if you are able to get it. That's what I am running.
What is the best way to reach 2800+ spell damage as a sorc? Like what is the best armor, weapons, and skills to use?
Also random question but is a half magicka half stamina dual wield and bow or destro staff sorc viable in pvp? I know the clear cut, all magicka, light armor sorc is the way to go but if i go for a sneak/melee hybrid build would it work okay if i get my weapon damage, spell damage and the crit chances up?