Magiclysm: A Total Fantasy Overhaul

I read that the Arcana mod is balanced a bit differently with both stronger enemies and stronger spells/items for the player, so I’m not super keen on having it make a bunch of vanilla and magiclysm stuff not worthwhile.

Been thinking about checking out the magiclysm expansion, is it possible to completely copy a world and its state then ‘create’ it with added mods or do I have to go for a fresh world if I want to add further mods?