See YouTube video - Master the pull-up, also YouTube playlist - Lateral separation.
From behind the 3-point line, quick rip to attack middle with a crossover step, loop over the first elbow, switch hands, loop around the second elbow, shoot a pull-up.
Switch sides, repeat.
Option - shoot 3s.
a) Cross and pull
Crossover dribble outside (move laterally, use a cross-step), pull-up jumper.
b) Cross and step back
Crossover dribble and cross-step, one dribble and step back.
c) Behind the back shuffle.
- Crossover stepback with no extra dribble.
- Crossover, float and run with the ball (two steps), one-dribble stepback.
- Behind the back (wrap) stepback (with or without an extra dribble).
See YouTube videos - Skip crossover series, Kemba Walker stepback, Curry shooting series part 2, Curry off-the-dribble workout.