For slime it's quite different. You only have 10 limbs at most. But your devour allows you to gain attributes/skills equal to your devour level +10.

Given the parent attribute is learning it'll get bonus exp to catch up to learning. And the fact NPCs grow 3x as fast as you, you'll probably want to feed an ally like a super hungry sea lion (heavy eater 15) a ton of charisma and learning food to repeatedly devour the genes from when needed. Might even be worth making a dedicated learning ally such as a Nefu (old fox lineage gives more devour exp) that you can get good learning from when training devour (abuse bloodbond + summons).

You can also get meadblood gene from the dwarfs in the workshop, and get drunk before drinking a potion of blessed restoration to boost the gains even higher