I don’t understand your use of ‘His church’. Do you mean Christianity?
So, since He knows everyones decisions throughout history, He bases His plan on that?
He has his plans for His church (which is made up with Christians). I don’t know how He bases His plans. But He doesn’t choose our paths for each person. He uses each persons choices. He does have a path that He sees will best benefit us, but it’s our choice to go down that path or not to.