You actually can westernize at war. Its the overextension that prevents westernization.
For 1.8 Ming, everything is worth it to rush westernisation, you quadruple your manpower and income after it, AND you lose the annoying modifiers. The only intervensions they need to do in Asia is to prevent Dai Viet from blobbing and ensure the hordes don't unify and get too big.The European nation can't do anything since they can't reach you so they can't get the 10% warscore required to ask for anything decent. They'll sign a peace deal for a couple ducats and maybe some war reparations after a couple months.
The method most definitely works, tried in a game only a few hours ago. Was thinking about using it for my Kochin playthrough but I'm thinking protectorate cheese will be better if it still works.
It's not ideal by any stretch of the imagination to try and rush westernisation that early. It is possible though if you really want to force it for some reason (maybe rushing the Kilwa achievement if you're that impatience?). The question was fastest path to westernisation after all.
That really only works if the colony is ridiculously close to your capital (so it's for home continent colonising only). It's good for a lot of african nations and I used it to great effect in my M'zab game where I colonised the caravan trade routes and blobbed into africa extremely early allowing me to fend off the bigger north africans.Another thing to ask: Do you guys do the colonist trick where you get 10 settlers each time you send a colonist, recall, then send him again?
That really only works if the colony is ridiculously close to your capital (so it's for home continent colonising only). It's good for a lot of african nations and I used it to great effect in my M'zab game where I colonised the caravan trade routes and blobbed into africa extremely early allowing me to fend off the bigger north africans.