I know but I think we need to know exactly how the parameters work to coordinate gifts, marriages, dissent, ninja use and war/peace.
So far I managed to plot against Hosokawa (38%) as Imagawa and an entire part of his reign turned to me in Kyushu and on the other side of Honshu. I wish to know if you can make a vassal defect without declaring war on his lord because I tried everything and it doesn't seem to work. So, if my assumption is right it means that the invite to clan is NOT working at all because with plotting it DOES seem that, somehow, you can make other vassals become your vassals. Weird and very curious about this.