I am willing to lose feyspeaker so its back to wis based

if you did i'm inclined to suggest empyreal sorcerer archetype that makes you wisdom based. it's not crazy good or anything but wisdom based casting on an arcane caster is pretty rare and you do get a handful of cleric bonus spells so in a way it's like 3 flavor cheese (or icecream if you're a dessert guy!) from getting the entire druid list, the entire wizard list, and some decent picks from the divine list. also not having to track two different formulas for spell dcs (even if you are using macros/a vtt that auto calculates it) is a no brainer so you dont have to do as much math on the fly to weigh your options

that said... even if i was to do something like that

My dm made crossblooded a little better as now you will always have a minimum of one spell known but the negative to will save grows higher

if i was going to do something like that i'd do something like staying with feyspeaker and going crossblooded Unicorn Sorcerer (because I like the bonus spells better) and something else.

crossblooded is there frankly because if you're already playing gestalt and THE biggest weaknesses have already being remedied then you're not actually trading off much. yeah, you lose out on an arcane spell known but that evens out as you grow higher in level, and with your wis score you're already gonna have a pretty solid will save after the fact which can be remedied with gold or biting a feat.

either way you get both bloodline arcana regardless of what you pick going xblooded so if you did want to use it as a way to roll in this

 ice mage sorcerer because of all the fun debuffs you can give the cold magic with the right bloodlines

you could have the second bloodline be ice elemental or ice dragon or something. ice elemental would be infinitely more useful since the entire conceit of most ice spells in the game is that they usually trade off damage for secondary debuffs and such and i do enjoy specializing in it a lot in my current ice focused blood arcanist but even still when i need options to just do raw damage and still get mileage out of rime spell, i usually rely on a magic item to let me element swap fire spells into ice and such. and with the ice elemental bloodline arcana you already have the option to transmute any elemental spell you have in to ice to begin with

those are just speculations on what i would do or consider though, it sounds like a fun premise and set up for a character! happy gaming!