Finish an Era with a Forest Village which has 500 Village Prosperity
The focus here is the projects and improved base abilities. As such you’ll need to develop several villages with an eye to create five ambassadors, enough to unlock the Forest Giant’s improved Fruit Plant ability.
So start with a lot of villages, one of each sort if need be, and slowly hand out the ambassadors until your Forest Giant has two of the chaps. This will allow you to plant and transmute Great Plants, improved floral features that generate significantly more resources than the vanilla versions.
With the second ambassador claimed then it’s time to concentrate all your attention on the main village.
Now for the maths. A Great Pear tree flanked by plants can generate uo to 70 Food. This is a huge total and, ignoring projects, 7 of these fully symbiosed plants would be enough to beat this development.
Just remember the basics; pop animals outside borders, apply aspects to everything, and focus on Projects. This development isn’t hard as long as you concentrate.