Here's how I start the setup. My cue stick is across the 1st diamond line, parallel to the short rail. The striped ball is a ghost ball and is 1-1/2 diamonds from the long rail. The 1 ball is froen to the striped ball. You have some leeway with this shot, as long as the 1 ball is in the bottom left half of the 1x1 diamond box, but you'll need to adjust your aim points accordingly.
For the 3 ball, I place my cue stick on the left side of the 1 ball and point it to the long rail point of the corner pocket. Freeze the 3 ball to the 1 ball and the cue stick. This will account for throw, which is quite a bit since the 3 ball travels nearly the entire length of the table.
For the 2 ball, I again place by cue stick on the left side of the 1 ball and point it towards the short rail point of the corner pocket. I freeze the 2 ball to the cue stick and the 1 ball. This aims the 2 ball inside the pocket since there's less throw because it doesn't travel as far as the 3 ball.
To make the 1 ball straight in the side pocket, I align the cue ball and 1 ball virtually straight into the side pocket. To make the 1 ball bank cross corner, I align the cue ball and 1 ball to the left point of the side pocket. To make the 1 ball bank cross side, I align the cue ball and 1 ball to about 2-1/4 diamonds. For all of these shots, I hit full into the 1 ball with a slight amount of draw, if for no other reason to make sure the cue ball doesn't get in the way of anything.