Biological Features Necessary for a Humanoid to Have a Much Higher Rate of Reproduction?

So for this question there's a Mad Scientist/Dark Lord that wants to engineer a race that can out breed mankind and carry him to victory. He has access to sufficiently advanced genetic engineering/plot contrivances to get the job done, but what anatomical features does he actually have to give to his genetically engineered humans to have them reproduce faster? Is it wider hips and narrower heads? Precociousness? A modified metabolism?

Requirements:

"¢They have to be intelligent enough to do basic tasks and take orders, intelligence may be significantly inferior to the average human but they still have to be capable of wielding weapons, harvesting crops and smashing rocks.

"¢They must have a fertility rate that significantly outpaces that of humans, it can't be an insignificant difference.

"¢They can't be absurdly smaller than normal humans.

Note: If it's too tricky to modify humans to be faster reproducers, what would some other genetic engineering options be?

posted about 4 years ago

NixonCranium‭

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