Yes and No, Illusion benefits from a lots of passive abilities may they be granted by items or skill but not all.

You can not benefit from bashes on illusion (Bash from basher, MKB, or Barathrum's bash for example). That would be way too powerfull. For the same reason, Feedback (diffusal blade's orb effect) works on illusion but only melee one.

You can take a look on the Illusion page of the wiki which give a quite exhausitve list of the passive your illusions benefit (or dont benefit) from.

Yes and No, Illusion benefits from a lots of passive abilities may they be granted by items or skills but not all.

You can not benefit from bashes on illusion (Bash from basher, Abyssal blade, or Barathrum's bash for example). That would be way too powerfull. For the same reason, Feedback (diffusal blade's orb effect) works on illusion but only melee one.

You can take a look on the Illusion page of the wiki which give a quite exhausitve list of the passive your illusions benefit (or dont benefit) from.