First let me state, love your mod. The work you put into the creatures is astounding.

Currently you can use the recruiting badge or passive tame at specific levels to get the various humanoid races. What if there was a Recruitment crafting table that had tiered versions of the Recruitment badge (or put them on the smithing table for each race). They could require X amount of resources. For example, the bottom wrung Divine guys would require a tier 1 light badge that costs 500 dark's (amounts made up to give example). The next level up divine guy would need the tier 2 badge thats 1000 darks, etc. Dark humanoids would require light to purchase their badges. You could do the same with the orcs, gelragians, mermaids, catpeople, sharkmen, etc. using different "currency" that is found on either creatures or their enemy faction.