do u mean vaul’s quiver or some other mechanic? because vaul’s quiver works all the time regardless of your hp. something like 4% ammo every 7 seconds.
the LB has no means of CCing the patrol to buy time for your party to kill. also, the hagbane should be killing much more than 2 SV per patrol if they are grouped up, unless you are hitting shields, then it does no damage.
also, hagbane doesn’t really synergize well with handmaiden, too little ammo and no ammo regen.
one of the hagbane’s core strengths is CC. in legend a longbow is not gonna save your group if they’re suddenly surrounded by an ambush, 4 stormvermin and a couple maulers and people are dying - hagbane spam to clear the area for breathing room is an example of the utility it provides. one of the best things to do is to heavy shot a huge bunch of enemies that are just about to lay the smack down on a teammate, it will stun all of them and buy time for that person to get away or kill them.
otherwise, str pot hagbane light attack spam on unarmoured parts of bosses is still the highest burst dps out of all the bows.