Modding

Hello. I'm making a small balance patch for myself and would like to know how I can change the amount of experience required for the sacrificial pit of the Dungeon faction to increase creature production. I think the Dungeon is too weak in the late game, but I don't want to directly increase the production rate of beasts and minotaurs, as these creatures are already quite strong, and I've already increased the production rate of assassins. I understand that the answer is probably already on the forum, but it would take a lot of time to find it, so I decided to ask here. Thank you in advance!