[Ctennyson]

With Master Alchemist + Alchemist Stone, its 30 gp per Earth Gem and 45 per fire gem.

Last Ulm game I had Earth Blood Deep Well and Eternal Pyre both running, along with Fata Morgana and Riches from Beneath for huge income/resources. In my best castle, I could pop out a Knight Lord and 24 Knights a turn, not to mention at least 10 knights(the mounted ones) at every other castle, every turn, with 1000's of gold left over. Obviously thats SP, in MP no one will let you have every enchantment, so you'd need the fever fetish strategies which arent as visible.

Build Blood Stones and Fever Fetishes instead of clams, and you'll be swimming in cash.