But...are there really any spells that are that good for this to be a real issue? Even without dual-classing, my sorceress can kill the Big Bads towards the end of the game in a single turn, like e.g. I just completely roflstomped
in a single turn earlier today with my sorcess, with no other party member having attacked her yet.
So "combat isn't balanced properly either so we shouldn't fix anything" is basically the subtext of what you just said.
Don't try and twist what I am saying. I specifically asked you a question, which you chose not to answer, so I'll ask again: what spells does that allow the sorcerer to access that would throw the game entirely out-of-balance?
None really. You can't use any damage based ones because they need INT. You can memorize some of the buffs like shield / haste / blur / mirror image, but are you really going to waste spell slots casting the latter 2 on a sorc?
Gaseous Form / Fly? Wastes of spell slots, you can get fly as a storm sorcerer or draconic, or with tadpoles.
Globe of Invulnerability is probably the best one you can cast, but it uses your level 6 slot which should be being used for twinned chain lightning or disintegrate using your Sorc spells so they use CHA for attack rolls. I currently have 3 or 4 recharges on my level 6 slot per long rest too.
Oh you could use a wizard slot for counterspell I suppose, but if you got 11 sorc / 1 wiz you also sacrifice a feat right? Id rather have both Spell Sniper and War Caster than add a wizard level.
