I do not see a problem in gem producers, as:
1) I beleive they more expensive in vanilla;
2) there won't be a NAP to protect you to produce them safely, and choosing forging clams for better future you could lose both. Clams and a future.
As for tartarians. Really, who needs juggernauts, poison golems and iron dragons, if you can buy a cloud trapeezing-regenerating SC with 150 HP for 10 gems?