For bossing, arrow sprinkle without barrage ART seems stronger than with ART
both are 1 cast experiment, max concentration and aiming
Conclusion:
aiming+no sprinkle:barrage ART
+more DPS
+can trigger thunder ark more
-if the target/boss cast trap/obstacle, some of the damage will be absorbed by them
-must target carefully at the center of boss
sprinkle:barrage ART
+no need to target at center of boss (easier targeting)
+no worries there are obstacle/trap around the boss, the damage will hit equally
-less DPS
-less triggering thunder ark