A way working for version 1.3:
http://forum.paradoxplaza.com/forum/showthread.php?737767
Every province you cede in a peace deal will reduce your AE with every nation
in the world by 15.
Every nation you release from your nation in a peace deal will reduce your AE
with every nation in the world by 30, regardless of that nation's size
Every nation that you end the vassalisation of in a peace deal will reduce
your AE with every nation by 15.
The most interesting part of this is that ceding provinces which don't even
belong to you still reduces your AE
所以:
1.養個附庸，餵地給它
2.等附庸把被餵的地造核心之後
宣隨便哪個小國，在peace deal中讓附庸把地還給原主人
3.宣原主人，逼原主人還地給附庸
Then repeat 2&3
有時在peace deal中對方對於你的投降條件并不感興趣
但沒關係...把對方揍到100%，這樣子它就會接受了
另外，放附庸國會減少AE，但減少的量并不多
但1.13版吞附庸國不會增加AE，所以你可以放了再吞，吞了再放
1.3版就不能了。