Epic Destiny Mantle Procs on Pet attacks

[Zarkarion]

I have noticed that my Thorn Epic Destiny Mantle procs significant damage (e.g. 1350 at level 25 - sometimes twice if more than one modality procs on a hit) on my Skeletal Knight attacks. (It was reported in the log as me hitting the mob for the damage, but it occurred alongside the pet's normal (pathetic) hits several times when my pet was attacking, and I was not).

Does this apply to all (melee proccing) Mantles? And all pets? (Not that any pet other than Skeletal Knight has enough survivability to be worth keeping out)