Скачать или смотреть Diablo 3 testing hungering arrow devouring arrow

Tested hungering arrow with devouring arrow rune,

hit 1: 324405
hit 2: 590695 (1.82 * first hit damage)
hit 3: 808923 (1.36 * second hit damage 2.49*first hit damage)
This make it pretty clear that the damage increase from each consecutive pierce is linear and not multiplicative.

Total damage with devouring arrow becomes:
1.55*sum(n, 0, infinity, (1+0.7*n)*0.35^n) = 328.343% weapon damage
With ninth cirri satchel +25%:
1.55*sum(n, 0, infinity, (1+0.7*n)*0.6^n) = 794.375% weapon damage

Total damage with puncturing arrow:
1.55*sum(n, 0, infinity, 0.5^n) = 310% weapon damage
With ninth cirri satchel +25%:
1.55*sum(n, 0, infinity, 0.75^n) = 620% weapon damage

All these damagenumbers are upper bounds on your damage since all mobs die eventually. The difference is minor however.

Also I am almost certain that the arrows time out pretty quickly, hitting more than 4 times seems unlikely for single targets, when mobs are close to each other you can still get a very high amount of pierces. This changes the damage for single targets to

Total damage with devouring arrow modified:
1.55*sum(n, 0, 3, (1+0.7*n)*0.35^n) = 313.396% weapon damage
With ninth cirri satchel +25%:
1.55*sum(n, 0, 3, (1+0.7*n)*0.6^n) = 550.808% weapon damage

Total damage with puncturing arrow:
1.55*sum(n, 0, 3, 0.5^n) = 290% weapon damage
With ninth cirri satchel +25%:
1.55*sum(n, 0, 3, 0.75^n) = 423.828% weapon damage