I just realized that I flubbed my comparisons above. Hills are 2p, mines make them 3p, and forges bump it to 5p. So the comparison would be (using PAD's proposal):
5p mine vs 2f4p base Anden (likely at least 3f4p with freshwater or adjacency, sometimes 4f4p with both, and even more in some unlikely arrangement where you're getting tons of adjacency).
I would pretty much always take 3f4p Anden over 5p mine. The only case that you wouldn't is if you're freezing growth I guess?
5p mine vs 2f4p base Anden (likely at least 3f4p with freshwater or adjacency, sometimes 4f4p with both, and even more in some unlikely arrangement where you're getting tons of adjacency).
I would pretty much always take 3f4p Anden over 5p mine. The only case that you wouldn't is if you're freezing growth I guess?