What is the rest of your formula?
Longer, cure of course, but the total formula also is important in determining how stripping your soap might be. Is it the same recipe you mention
here? If so, it needs a much longer cure. And don't ignore DeeAnna's comments about that high of a SF. Or is it the 3 oil soap listed
here? Still don't know the formula for that one, so that's important. By using PKO and CO together in the same formula you are increasing the lauric and myristic acid (stripping) of your formula. Refer back to
DeeAnna's post in that other thread about what that does to some people when soap is made with oils high lauric and myrstic acids.
Yes, I would absolutely lower the CO percent as you've been advised, AND I'd also lower the PKO as well. Both together can be quite harsh, depending on your exact formula. Sure, I'd add some shea, but I wouldn't use more than 10%, although some go higher. Castor I would not use more than 5%, but I usually only use 3% when I use castor. Some use a bit more.
What other oils are readily available to you? It might help in order for members here to give you suggestions of how to better tweak your current formulas.