There are two kinds of people - those roll for damage and those I don't care to know.

Skip both.

(from Apocalypse World 2e)

I prefer fix damage tie with your roll. Like Shadowrun 4 does, I find that it’s easier on combat heavy game

However I’ve recently GMed a Slugblaster one shot and inflicting a improvised damage called « low battery » on one of my players was a lot of fun

Neither. Thee amount of shifts above defense determine stress or consequence.

Or the effect die will determine the consequence.

I don't really care, the number of rolls in a game might be too much or too little either way.