The 2-7 combo is the best route to run the rack. Put Qball on opposite side of 1 and roll towards side pocket or diamond 3. Try to land on the rail or close to it. Shoot 2 slow & slightly into the rail and let 2 land on end rail after making 7. Then cut 2 and go down for 3. If you get bad on 2 you can play a good safe up to other end of table.
It's not easy to get on the 2, but possible, how you're attempting. But playing the 2 up past the side pocket is tough unless U get almost straight in. Plus, if you don't get straight enough, you'll likely run into the balls in the center of the table and not have a shot on the 3.