I like how Pathfinder 2E does it. A 20 brings your result one tier higher. A 1 brings your result one tier lower. With a high enough base expertise, you can still succeed when rolling a 1, just not as awesome as you normally are. And a 20 isn’t a guarantee against really strong foes.
I like how Pathfinder 2E does it. A 20 brings your result one tier higher. A 1 brings your result one tier lower. With a high enough base expertise, you can still succeed when rolling a 1, just not as awesome as you normally are. And a 20 isn’t a guarantee against really strong foes.