I think merging cost need to be looked at.
Currently cost with no research into cost reduction (per pact)
Currently cost with all research into cost reduction (per pact)
So gold is 10% of Anima cost which is 10% of each other Resource cost.
I think if the gold cost if fine but the Anima and other Resource cost should be flipped with a 30% reduction of Anima after. This would make Aquiris - Overflow skill and Bonehead - Animated skill needed. Production/storage of Anima in spring would need to be increased to at least same as Ore(Mines), but same as Food(Farm) would be preferred.
Proposed cost with no research into cost reduction (per pact)
Proposed cost with all research into cost reduction (per pact)