Okay rolling this around in my head for my Bladeforged 2 Pali 18 Sorc air savant... Putting some points in INT is really not that bad a deal, sure you wont get the same boost to SP as Wiz's lets get that out of the way and take it for granted in this discussion. However it opens up a lot of other synergies that help compensate.
For starters I dropped CON from 20 to 18, lets be real 23hps is not that gig a deal, when geared right I suspect I can drop from 18 down to 16 without pain. So Maxing CHA and nothing else you're left with 6 points to put in INT.
Obviously this gives a great number of skill points you wouldn't have, also obviously you're going to nom a +4 INT tome because that improves spell power via spellcraft skill mod. So we're talking about lots of skill points: cross class UMD is a given. cross class repair now that it's going to give you reconstruction spell power is also a given that takes some serious skill points (4 per level) spellcraft is hopefully AT LEAST a class skill for Sorc's even if it doesn't use they casting stat for it's modifier. So we're at 5 skill points per level minimum needed add about 10 or 50 cross class jump points and 1 per level for concentration... 1 per level for Diplo or even Intim maybe to take advantage of the high CHA, we're at 7 per level plus a couple for jump.
You're going to gear for INT, 14 base +4 tome +8 gear +3 insight +1 exc or 30 INT which is a +15 mod this is raising your repair spell power and of course spellcraft... but there may be more synergy:
Insightful reflexes seems like a juicy pick here, your reflex is your lowest save by a good bit, even with Divine Grace giving you great saves it might be worthwhile. (hard to tell without my own Pali/Sorc to test in higher level content) going from -2 (6 DEX) to +15 is a 17 point swing... for one feat. Even more crazy if you splash Monk for evasion.
If you look at the spellcraft proxy nerf of Sorc's as an oportunity* I think you'll end up with a more well rounded character. I'm not even planing toughness on mine... Though once geared I tend to drop toughness on many toons anyway as long as they stay above 600-700hps
*(honestly they need to throw Sorc's a bone somewhere in the EP regardless of spellcraft change, maybe they should let Sorc's (and FvS) to get twice the crit % from the newly nerfed lore affix like they do from spell point items? Or perhaps make the Sorc crit enhancement line 3% per tier with 4 tiers)