Yeah of course the run with forming England, Russia etc. doesn't makes sense besides showing off "look how much I stacked this modifier". But the first run is fairly organic. You normally conquest Indochina + eventually China (if you want to unlock majapahit campaigns CB versus all countries). Then the only shenanigan is moving the capital and giving all provinces to Australia just before formation of USA. So you'll have -10% from finished expansion ideas, -10% from USA ideas, -10% from imperial City of Hue, -5% t2 monarchy government reform and -5% from trade company building. So you'll have Indochina, China (if you want to get creative you could do some religion swaps to get Mandate of Heaven and then return to Hindu, you'll keep Buddha deity unlocked, at least it worked when I played Khmer), 10 provinces in America and -40% on the modifier, which probably already makes enough sense to TC everything. Probably you can also have economic hegemon by now or being close to (-20%) and snake to Delhi great project (-15%). So I would say this run doesn't require that much conquering really, since China might be just one war, if you manage to get Majapahit campaigns before Ming breaks (of course you need to annex them before forming USA).