So this achievement isnt actually that difficult, your biggest enemy in endurance is your own mind and the games controls.
The aim assist is god here just make sure to leave yourself in a good area after each shot and always go for the ball closest to you if you can as moving your cue 180 degrees chews the clock, just keep a steady pace of potting and keep your shots safe. Make the most of the shadows of where the new balls are going to be too, they can really help you set up your next shot.
All you need is one good run and youll get this no problem.