It's just that I saw you mention the words, "like the breeders do it" but this certainly sounds more like a pollen chuck.
If you want a little tip, breeders start by stabilizing their parents first and get to know their plants. Make the F2.F3,F4, and learn how to get out of a plant what you want it to do.
Otherwise you're just creating the next poly whatever. Or do a chuck and call it what it is.
Grass Monkey was a 6 year project. It is the way it is because lots of time was spent narrowing down the traits important to me.
You want to know why the 9LB hammer cross is a failure? Because the pollen chucker that made it is a pollen chucker and took plant A and B and made C.
Create a tool box then build or be a chucker.
Huge difference being a breeder which is a dying art form.