What are you trying to achieve? If you are hoping to reduce porosity and increase elasticity with the penetrating fatty acids in coconut and avocado it would make more sense to use the oils straight up. The hair cannot utilise most of the components in coconut milk or whole avocado since they are too large to slip under the cuticle, and it could be a pain to wash out. Neat oils should be applied to dry hair - oil and water dont mix - the excess comes out well with conditioner only washing.
Technically your proposed mix would not be a conditioner, that would need to contain the major emollients (fatty alcohols and cationic surfactants).
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