Leave in conditioner with Amodimethicone

If we use Stearamidopropyl Dimethylamine, setearyl alcohol and Amodimethicone emulsion in a leave in spray hair conditioner, what percentage of these ingredients should we use?

For leave in conditioner, is SPDMA, setearyl alcohol and Amodimethicone a good combination? 

What would you change, add or remove to improve it's performance?

Other ingredients would we water, preservative and 0.05% fragrance or even fragrance free. 

Final pH would be 3.
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