You have three stats and each stat is a target number. When you do an action, you roll 1d20 vs. your own target. Then you follow up with whatever results are called for, such as damage.
And this is fine. This works. But I wanted to simplify and reduce dice rolls so I was strongly considering taking an Into the Odd approach and eliminating the action roll, going straight to the effect roll.
But I'm also taking a cue from The Black Hack and making the players do all the dice rolling. So when you are attacked by a monster, what do you roll? It doesn't make a lot of sense to roll your sword damage in that case. But the original three stat mechanics do work just fine for this since you're rolling against your own target, regardless of the weapon or attacker.
For now, I'm sticking with three stats as targets because in every case I've thought of so far this works, especially for a game where players make all the rolls.