Do I understand correctly you want to have an emulsifier free serum with 10% lipids?
You need to realise that around 10% lipid is being used it normal lotion/cream formulas.
To solubilise 10% of a lipid you would need (depending on the type of oil etc..) around 50% of solubiliser. As usually it takes 5:1 ratio. Sometimes even 10:1. (1:1 if you are lucky). So imagine it in a formula.
Usually more than 5% of solubiliser feels sticky on the skin.
So if you lower the oils (all oils - including antioxidant, fragrance etc) to a normal level, you need to solubilise it first in P-80. Basically mix those two properly (micelles are formed) and then, in small amounts add that solubilised lipid into the water phase and wait everytime until solution clears. Some might not finish as crystal clear at all tho.
Hope that helps.