A bigger radius!

A simple first step:

• Move Major Prophecy/Savagery to Surge.
• Move Major Sorcery/Brutality to Lightning Form.
• Move Minor Force to Bound Armaments, add Major Resolve.
• Move Minor Prophecy from Dark Magic to Storm Calling.

I don't agree with removing Major Resolve from Storm Calling, but I can better support the direction if the game didn't constantly require me to delve into all 3 lines to get the tools and buffs I want for every single role. Surge is such an identifying skill to Sorcerer, that it's perplexing as to why it asks you to now take Daedric Summoning for Major Prophecy and Dark Magic for Minor Prophecy, when NB's Assassination has Major+Minor+Unnamed Force built in 1 line among its best damage skills, and further Crit Chance passives.

End goal:

• Shuffle skills around between Dark Magic (healing) and Daedric Summoning (tanking), as well as rework/retool passives to fit new themes.
• For example:
  • Swap passives like Persistence from Dark Magic with Rebate from Daedric Summoning, frankly rework rebate because it's boring and inconsequential, but you get the idea of matching the passive to the role.
  • Swap skills like Rune Prison from Dark Magic for Curse from Daedric Summoning. Defensive Rune could apply to your pets in addition to yourself, while Rune Cage could become a Daedric Prey replacement providing pet damage dealt and some type of single target soft cc/debuff for tanks.
  • Now that Minor Prophecy is moved to Storm Calling, introduce a brand new passive for healing done or healing crit chance to better fit Dark Magic.

I have a ton of ideas like that, but that's the general premise. Make Sorc lines less of a mess, move some non pet damage skills out of Daedric Summoning to Dark Magic, then introduce some more tank and pet tools to Daedric Summoning.