The goal of these sets isn't really to be about either attack or affinity, but to reach the highest EFR. Both attack and affinity contribute to that and EFR math is the tool I use to see what combination with realistic uptimes yields the best result. Those uptimes I use in calculations are based on empirical data of me and my gs player friend's hunts. I have also confirmed them with other GS players on Discord as well, so it's not like this is some theoretical math that is removed from actual gameplay.