5th approach to Eat my greens
Finally done
30 years after expected, but plan B to delay global trade worked even though I built only maybe 5 manufactories or so (simply I didn't have cash, I had to maintain big army :] )
I should have finished 1615-1620, but I could not locate the final province. i tried to steal maps from everyone I could, but Aldyn in Sibera was unrevealed, I also thought I coloniased all required in Siberia
To those tying this achievement: lesser Sunda Islands, Timor, and 4 siberian prvinces must be colonised. I was also blind enough ot to see for a long time macau is also grassland
Anyway: vassals/marches everywhere, sometimes extremely hard to keep them loyal with divert trade. I had a period of nneverending 15years chainwar (and punitive one) just to prevent them ally and rebel, trying to level up karma for diplorep: Malwa, Andhra, Sunda and less important Ouchi, Luristan, Uzbek, Haixi.
One coalition only, 11 nations from mamluks in the west to Sulu in the east, finished with 99% lose while giving only 1 province to Mewar. The rest score was cancel subjects.
I think I went pretty unusual ideas and religion.
As Kale starts with 0 religious unity anyway, I decided to switch to Vajrayana I think 5 morale is worth losing in the beginning 100 prestige. My first 2 runs were as Hindu, and simply I did rather weak. Vajrayana gives me 5% morale and 5 discipline + 2 diplorep from karma, and the ability to declare on basically everyone. Also tributaries are great to stop AE and you can core on their borders!
Ideas:
Religious. Usually my first pick whenever playing buddhist. Ability to declare on everyone + not paying for any province in peace deals. It means that for example you can attack enemy, release a country or more, take the rest paying no dip points. This way you replace non friendly country by friendly countries, which will be very happy to became tributaries, and stay in neutral karma.
Diplomatic:
obvious. And policy with religious for 20% religious unity
Expansion. Bonus colonist, bonus merchant (exploration doent give it) and very very important +30 trade power (+20 idea, +10 policy). And more diploslots and diplorep (policy)
Of course no military ideas at all. Military points were needed to 5xrecriut general for manpower,
Hard achievement. But I believe possibility to delay global trade makes it easier than True heir