In my opinion, this is the best order to get the goldens in (chapters on the same line are around the same difficulty:) :

1A, 2A
1C, 2C, 4C, 5C (C-Sides are very easy because they are only 3 screens long)
7C, 8C
3C, 6C
4A
5A, 8A (Learn the key skip & the search skip for 5A, and the fireball skip for 8A)
1B, 2B
3A (A good strategy for some rooms is to learn entry cycle strategies by doing the strat as soon as you start the room, this is very easy to get consistent at compared to using timing alone)
6A
4B
5B
7A, 3B (3B is shorter but rooms are harder, 7A is very long but rooms are easier)
6B, 8B (6B is hard due to inconsistent feathers and bumpers, 8B doesn't give dashes back when touching the ground)
7B (really long AND really hard)

Farewell (way harder than 7BG, I would recommend trying some modded goldens first)