Buy what gives you confidence in the decision, but regular old standard full length die sets with regular old expander balls that overwork cases and whatnot, will still give good results in a rifle with 1/2 MOA accuracy. Case necks split faster from being overworked, but annealing every 3 shots lets most cases survive at least 10 shots.
If a gun has potential to shoot that good or better I’m a fan of bushing dies, mandrels, neck turning, Wilson seating dies, fancy brass, weight sorting, etc., but on most hunting rifles that is all just waxing the hubcaps on the pickup hoping for better gas mileage.
Reloading is about the fun of experimenting so if something sounds interesting by all means try it out. Many of us do things we know don’t help, but it makes us feel better, and that’s reason enough. I suggest you get used to testing new techniques or equipment to see if it actually made a difference on target, most things do not.
It’s human nature to be drawn to reloading ideas that evolve over time, even if we don’t know why. Each level of accuracy has its urban legends and techniques that work well enough. The current one that stands out is the full length sizing .004” shoulder pushback that everyone repeats from benchrest, to f class, to PRS, to the shooting podcasts, here, and even uncle Jimmy who only plinks at 100 yards. It wasn’t that long ago when necksizing was setting accuracy records, so what happened? The resistance of working the bolt with neck sized brass slightly disturbs how a benchrest or f class rifle is settled into the rest, especially when rapid fired, and one guy started winning with carefully full length resized brass in custom FL dies and it has taken over and has been reinforced with new gizmos marketed everywhere that help measure shoulder setback. Simple neck sizing is still as accurate as it ever was when a winning target may have been .104” instead of .099”. By all means buy the gizmo and aim for .004” setback, but just for kicks, at least once, unscrew the sizing die 1/2 turn to not touch the shoulder, and shoot a group.