I agree for this ask if something have changed in AAR-ADR sytem of if simply the enemy ADR got lowered.
if that’s true 5 AAR Barrage + 2 of vubbe gloves would justify why hit all two monster at time.
you can be sure of that testing in crystalmine with 3 larger boss at time. if you with only 2 is b/c barrage got an hidde AAR value of 5.