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I've already used the Companion skill and I know the mechanics for the Spider and Bat effects. There are some things that I cannot get from the tooltips though. More specifically:

  • how often the companion attacks. The tooltip states a generic "periodically". Is it influenced by weapon speed?
  • if and how the damage is influenced by weapon DPS. I've noticed the percentage of damage on the tooltip changing. Does it depend on weapon DPS? How does it scale?
  • the Boar's damage. Is it the same percentage of the other companions? Is it divided among the enemies? Is it an AoE? (I'm still too low level to try this rune)
  • the Ferret's attack. Is it different from the other Companions?

I'd like to get some math in the answer, possibly data tables and offical sources.

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I know these are three questions in one, but I thought they are all related to the same skill. If you think I should split these into three different questions just let me know. –  Kappei May 24 '12 at 8:28
    
I'm sure that the skill is affected by the attack speed/depends on the attacks per second of your demon hunter. I am however only level 18 on my demon hunter, so no idea about the other questions. –  Timothy Roy May 24 '12 at 8:31
    
@Kappei: Have you enabled the advanced tooltips? They might give you some more information. –  MBraedley May 24 '12 at 11:04
    
@MBraedley I should check (I'm at work right now, so no Diablo), but I'm quite sure that those linked are already the advanced tooltips –  Kappei May 24 '12 at 12:36

1 Answer 1

up vote 6 down vote accepted
+100

Companion damage scales based on attack speed. This was confirmed by Bashiok and tested by theorycrafters, who arrived at these numbers*:

APS    Companion Damage
1.00   30%
1.34   40%
1.40   42%
1.43   43%
1.60   48%
1.84   55%

*Calculated by looking at the in-game tool-tip, which changes based on the APS of the character.
Note: The wolf, being a shorter duration (25 seconds), does twice the %.

That is, the companion does the % of your weapon damage based on your APS. If it follows this logic of being a channeled DoT (which is what most theorycrafters have come to agree), then based on Bashiok's post, the tick rate (how often it attacks) increases as your APS increases. As for speed it attacks, it would behave like any other DoT in this situation. It would attack once per cycle for its inherent percentage, so if your APS is 1, it attacks once per second for 30% weapon damage. If your APS is 1.6, your cycle time decreases to 0.625 seconds per attack (1/1.6), so it would attack once every 0.625 seconds for 48% weapon damage. If it follows this model, your weapon damage would have nothing to do with companion damage, but its speed (and therefore indirectly, its dps) would affect companion damage.

As for the boar companion, it says on the wiki that it "strikes multiple enemies with every swing."

Edit: After some testing with a level 60 demon hunter, it appears that the percentages are roughly correct. For the ferrets, even though they are animated to attack separately, it seems the total damage is split between the two. The boar is really hard to judge, but as far as I can tell, the damage is the same as the others, just as a cleave attack that hits enemies in front of the boar for full damage to each.

All this information is gathered by personal experience or by experiences posted on Diablo forums that were confirmed by more than one person. It's difficult to get exact answers until everyone starts posting their findings, since Blizzard rarely explains how game mechanics work.

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Do the ferrets even attack? They just run getting gold for you. –  Michel May 24 '12 at 13:47
    
Yeah, they do. But their damage is also probably less. –  Ben May 24 '12 at 14:10
    
The ferrets' damage are the same as the raven. Also, you are correct about the boar doing a cleave. –  AndrewKS May 30 '12 at 7:45
    
"just as an AoE attack to all enemies around it" means that it splits the damage or does the same amount to every enemy around? –  Kappei May 31 '12 at 5:30
    
It appeared to be doing the same damage to everything it hit, and it looked like full companion damage. It was also more of a cleave, I haven't seen it hit anything behind it. Updating answer. –  Ben May 31 '12 at 13:22

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