Orchestral piano reduction

There are far too many variables to tell you do A B C every time. What you will want to do in general is use a combination of Edit->Tools->Implode and voices to put the score into a piano reduction. Keep in mind that each staff on a piano can have 4 voices. If you are a pianist you can do a reality check on the reduction and remove unplayable note combinations. If you are familiar with music theory you can use certain things to your advantage like removing some octave intervals and fifths that will do little to affect the sound of the song. Also remember the Selection filter (F6) will be your friend when it comes to copying and pasting individual voices into a staff.