The most you can do is have the respec NPC costs 0, and maybe a usable item that summons one. Stat points can’t be altered without a 3rd party program like GD Stash or GD Defiler.
GD Defiler is the only thing you need, it is simple, straightforward and versatile - you can edit both modded or vanilla chars.
Simply delete the mastery and it will respec all the points. Resetting stats is even easier.