Till you touch another blob, and watch yourself get burned alive by mandate...
Only the ottomans could crack a +0.80 mandate increase and even then it can be simply negated by releasing a vassal on the border. The mechanics of MoH Ming are completely broken.
Just recently I was forced to defend against my own Alaska CN because it attacked my tributary. Not to mention the fake “wont join” when declaring a war against a nation with an allied tributary. Did I mention tributaries follow the same AE rules as vassals? I ate 400 development from Korea. Nobody bats an eye.