My number one rule is: If it works for you, stick with it.
Rule # II: Some oils make your hair softer than others. For
example: glycerine oil makes my hair so soft that sometimes it weights it down, making my hair look like a cotton ball. Only use it with other oils, or mix it with rose water, aloe Vera juice, or distilled water for a good spritz during colder weather.
Rule # III: Amla oil is a combination of 3 different oils. If you use Amla oil as a pre-poo treatment, you don't need a protein treatment the same day because it makes the hair feel so strong and healthy. Amla oil makes your hair look darker also. You don't need Amla oil if you have extra virgin coconut oil.
Rule # IV: When you buy a new oil you should use it by itself first before mixing it with other oils; this way you will know what the oil does to your hair, or if your hair likes it.
Rule # VI: If you use coconut oil as pre-poo you don't need a protein treatment the same day. Coconut is rich in fatty acids, which may not be good for you if your hair is protein sensitive. Does coconut oil make your hair crunchy? It's because it freezes during the cold weather. Just like it does when you put it in the refrigerator. A little bit goes a long way.
Rule # VII: Do not use glycerin oil when doing a hot oil treatment because this oil and heat are not friends when it comes to your hair. As a humectant, glycerin can draw water from your hair during hot seasons. The reverse is also true.
Rule # VIII: Jojoba oil and extra virgin olive oil do the same job. They both make your hair soft and strong.
Rule # X: Jamaican Black castor oil is the only oil that actually makes my hair grow. The other oils help me retain length by keeping the hair moisturized. It also makes my hair thicker while keeping it soft at the same time.
The bottom line is you only need 4 natural oils: Jamaican Black castor oil for your scalp, Extra virgin olive oil to seal your ends, extra virgin coconut oil for your pre-poo, or hot oil treatment, and glycerine oil when you need more moisture and softness during colder seasons. You can also use all four oils for your Shea butter mix.