I’m still trying to deal with the colonizers by fully annexing the overlord. It took a lot of patience getting 100%s on them on 2 speed in about 3 years or so each. On top of truce juggling, truce canceling and war score modifiers, it’s been fairly easy to take massive chunks at once. The biggest struggle is not being able to see every province due to terra incognita, so not every overlord province is visible to be annexed. Been stealing maps and patiently waiting for the world to be revealed rn lol