You are making it more difficult than you need to.

You have a CYA of 100. That means your normal range for FC is 8 - 15 and your shock level is 25.

You have CC greater than 0, and greater than .5. Therefore you need to shock.

So shock to 25, and keep it there till CC is zero.

Thereafter keep your FC AT least at 8ppm.

That's all unless you drain and replace water to lower CYA.