Realm Divide triggers?

[Jacobin]

Having conquered 21 provinces as Mori in my legendary domination campaign I stopped and made peace with everyone as I wanted to build up my treasury before taking Kyoto and triggering RD and to use my monks to create a buffer zone of rebels around me.

But after only a couple of turns a rebel army popped up in my last conquered province of Owari (despite their being half a stack in the castle, an elite full stack outside and no enemy monks in the vicinity) and I had no choice but to fight them - and the victory triggered RD.

This triggered the usual piling on of former friends and allies, the collapse of trade and bankruptcy which has forced me to attack and loot captured enemy capitals just to keep afloat financially and might force me to have to disband armies and fleets and pull back and abandon multiple provinces.

So has anyone calculated the impact of different factors on RD?

I assumed it was almost entirely provinces conquered but clearly winning any victory also has an effect.

(Having said this its actually rather cool that I am having to fight so hard at a stage when every other TW late game has been a cakewalk to final victory - and having seen how easy it is with maxed-out monks and an AI that inexplicably leaves key frontier provinces undefended I can't help but see the incite rebellion mechanic as verging on an exploit).