Why do monsters attack certain targets?

[Crystalion]

in 1.10 BW/BP aren't 3rd Party monsters but allied minions. Other minions like Skeletons, Pets and hirelings won't attack allied BW/BPs in 1.10, and friendly ranged attacks will simply pass the Bones.

Well, my difficulty in being helpful here, is:

1) I'm away from being able to do 2 character testing for a couple weeks
2) my recollections could easily be from v1.10 beta, not v1.10 release

So I apologize for the following, which no doubt contains errors and misimpressions that I would usually try to vet a little before posting...

To the best of my recollection, not all of the quoted theory jibes with my empirical experience.

For example, last time I checked, Iron Maiden on monsters killing themselves on bone prisons still did not give kill/xp credit to the (BP/IM) casting player. If this is indeed still true, it would be improper to categorically class BW/BP as allied minions.

A further recollection, from *after* the BW/BP player targeting/pass-thru change first occurred, was that some player attacks still intercepted them (iirc, e.g., piercing exploding arrows).

I also vaguely recall being able to shift-attack an adjacent BW/BP (again, no idea how recent/what version we're talking here).