DISLAIMER to those unfamiliar: I refer ONLY to Certified climbing/rigging gear. A 'strap' is a generic term. The straps we use are certified to hold weight it tons. I am NOT referring to improvisation gear.

Not familiar with the term "Z" rig. No prusiks 'needed' with this. The ascender takes that place. Right now the setup I'm using is a tie in (strap over beam) with the pulley attached and the ascender attached (carabiner) to the pulley. Rope run through to allow for hauling and no back sliding. Realized I should get a second pulley (and more rope) for mechanical advantage. Right now no advantage is needed.