I didn't read it whole (just first 20 and last 10 posts) What about 3 lvl sorc (CHA only 13 for taking MC) for metamagic and Wizard X (with max INT)? MC spell slots remain same, so in 20 lvl you have access to 9th spellslots and spells too. And "at will" transfering spellslots need more higher slots? sacrifice lower and vice versa.
I dunno, your SP are based on sorcerer level, so you're pretty limited in what you can do with just 3 per day, and the price is really high: 3 levels behind in getting the next spell level, 3 levels behind in ASIs, and you have to sacrifice your DEX and CON to get your CHA up high enough to qualify. Maybe there are some very specific builds where it could make sense (though I'm struggling to think of any) but for a typical wizard it sounds like a terrible idea.I kind of decided sometime after the first 20 posts to focus on Wizard to cast spells not available to the Sorcerer and to get them earlier I decided not to multiclass, but that is not a bad idea, thanks for the input.
Even if you're taking the sorcerer levels after 17th so your spell progression isn't delayed, is 3 sp/day worth of metamagic at 20th worth giving up Signature Spells for 3 levels?
Fighter 1 is probably a better way to get CON saves without a feat, since you also get a ton of AC out of it and want DEX anyway.