A homoculus is an artificial human being that is created through the magical science of alchemy. These creatures are born in artificial wombs by a dark ritual that requires various materials, and the sacrifice of seven individuals. This dark process creates a fetus, which is housed in an anniotic sax and then quickly grown to adulthood inside the chamber.
An homoculus is born with no soul, which normally serves as the metaphysical "roadmap" to the design of a human being. As such, I have the freedom to manipulate and shape their biology to suit certain purposes. After they are completed, they are then released from the chamber. I have decided to make them hulking monstrosities of death, lacking higher brain functions and only meant to serve and defend. Therefore, I would like to cut out the "nonessentials" of normal human development and simply focus on size and muscle mass. A perfect example would be this:
Being created in an artificial womb gives me more freedom to design them in the way I need as I have more control over their development. This object provides oxygen and nutrients to the fetus, as well as waste disposal. However, I need these creatures to be made as fast as possible in a suitable time frame. Based on these parameters, what would i need to be able to create these artificial humans?