I had a rebel token with Hexgold Halbred and Machinist's Arsenal (and various other equipments) to 20/19 and was also echanted by Witness Protection. Normally, Witness Protection should only affect the creature token, not the equipments on top. The equipped creature was blocked by Qarsi Revenant which should have resulted in 17 damage passing through, but nothing happened but the Quarsi Revenant was destroyed by first strike damage which came from the same Hexgold Halbred.
This somehow seems like something has been applied in the wrong order.