Too lazy to read all that.
He's a good example of what I did.
When I had a non-AE sorting system (i.e. just transport pipes) and I wanted to send more of one item to one place, than another. Say, my tree farm was producing a lot more wood than what I wanted to save.
1. I split it in half. Two side of a diamond pipe were set to wood, theoretically it should be half.
2. I wanted more to be recycled/turned to charcoal, so I set a third side to the diamond pipe to wood, but put its output to the same as one side.
Now the ratio is 2:1, or 66% and 33%.
By using this logic you can successfully approximate the ratios to which you want to split up your items. Luckily the same sides of a diamond pipe can be used to discern multiple items. Even if you need those items to go to different places, another subsequent diamond pipe is all you need.
Transport pipes are so much more fun than AE, but the power of import/export buses. Cake man, cake.