So several skills “shotgun” and require a larger target to test their damage on. With a smaller dummy it’s impossible to get a read on how you’d do for bossing as multiple projectiles cannot hit the target. If there’s going to be a boss target dummy, why not make it the size of a boss? Or add an additional one that is (there’s an empty space in the Champion’s Arena area AFAIK).
For example Puncture with the triple Mirage node, or Multishot with the “all arrows can hit the same target” node. I’m sure there are others for other masteries too. These cannot be tested properly on dummies currently. With Puncture I was actually unsure if it could shotgun, and having a dummy large enough would allow me to test this outside of the chaos of a boss fight.
While I’m at it, it’d be great to have a target dummy that’s level 100 to approximate damage in empowered monos with the large innate mitigation mobs get per level.