Thanks for this thread, this is never an easy decision.
About the suggestion for Gale in this thread (Storm Sorcerer 8 / Tempest Cleric 2 / Evocation Wizard 2), it would have to be a very specific setup though.
You have to start with Sorcerer or Cleric, not with the Wizard, which has to come *last*, and all attack spells, other than Magic Missle, which has no save or attack roll, and Counterspell, which you cant get as Wizard because there are no scrolls, have to be cast as a Wizard.
For that matter also Shield, Enhanced Leap, Find Familiar and Longstrider are not found as scrolls, but are all very useful spells to have, so you have to take them during Wizard levelups. There are three high level spells which arent available from scrolls but they arent that important (4: Otiluke's Resilient Sphere; 6: Arcane Gate, Create Undead).
You will also have to have Intelligence really high (16) and focus on leveling Intelligence, to the point of not being able to do anything else. Thats the only way to get more spell slots for a bit of variety. Wisdom can stay very low (12) and Charisma is actually uninteresting (8) because Sorcerer doesnt get any extra spells readied from Charisma.
The focus of this build is casting Clerics Create Water with the Sorcerers Quicken Metamagic to make opponents wet, then target the now wet opponents with lightning spells, possibly twinned. Thanks to Tempest Cleric those can be cast to maximum damage.
