Some mod packs are set to patch status, rather than mod status. This means they'll be active even if you don't select them. I recommend putting all your mods in a separate folder to ensure that they're not enabled.

I managed to fix without uninstalling any mods and I still find it pretty odd. I basically wanted to isolate the cases for the crashing so instead of moving all the mods I actually disabled all of them. I enabled the actual Extended mod first to see if it was just my computer having rendering issues. After it worked by itself, I enabled one at a time, and then a few at a time, and then finally all of them and the game worked. I don't understand why it was crashing so much still but that doesn't matter much that the game works and I quite enjoy it with a few exceptions. The amount of fame gained from these is insane considering I caused the divide by turn 18.
I should try to find or create a mod that lowers down famegain from all these areas, or at least create a higher cap for it.

There's a mod that alters Realm Divide so you could try using that one. Alternatively you could make a mod that alters the "prestige_level_" entries in the "campaign_variables" DB table.

I'm already using a mod that alters the Realm Divide however I might just edit the prestige level until I find something that works.