All you lot who haven't posted any sites yet, please post at least one. If you really don't have any ideas, post a level 2 site that generates two gems and has a scale effect. According to
this thread Productivity, Sloth, Luck, Magic and Drain have least sites affecting them.
Here's another resource that can be used to either get ideas, or to see what requires most attention.
Max path to search by
What terrains don't have sites. Example:
sea
A4:0 - There are no Air 4 sites for this terrain. In addition, because there's no mention of Air 3, we know that there are non-unique Air 3 sites for this terrain.
D2:1 D3:0 D4:0 - There are no D4 or D3 sites at all, and there's only single D2 site, which is unique.
The post also lists all unique sites, which includes (AFAIK) all level 4 sites.
There are no Water 4 sites that appear under water!
F4: The Sun Below
F4 (waste only): Prison of the Desert Sun
A3: The Rainbow Shroud, The Inverted Tower
A4: Palace of Dreams
W4: The Sea Underneath
E4: The Factory
S4: Library of Time
S4 (mount only): Throne of Enlightenment
S4 (waste only): The Mountain of the Past, The Endless Field of Cubes
N4 (waste only): The Previous Forest
N4 (forest only): The Vale of Unicorns
N4: Soul of the Wild
D2 (sea only): Dying Ground of the Whales
D4: The Shadow Furnace
D4 (mount only): Crown of Darkness
B4: Hall of Flayed Skins