Very good Mike stay working FailSafe, 2 connections. i bring 3 (LifeLine redirct/short support) just in case myself.
"You are going to war, ....always have a backup; ....2 is 1, and1 is none" Screaming DI to troops in GI Jane.
Practice and maintain the action of needed gear deployment till it is nothing to do; if it takes so much time to swing lanyard around someting and click it in home; maybe you haven't done it enough to make it that shmooth i would always tell myself. Get somnething down like that that you can fire pre-loaded like a gun slinger.
Without voiding my lifeline's capaccity, readiness to catch me soon, i will use a rigging line for posstioning ease and speed. In a pulley, going to a rigging point. Set rig in upside down U, you can set lifeline in a 3rd zone. Work 1 zone, have 1 end of rig pull you to next, then let uther end of "U" rig pull/help to other side, and finally swing to under lifeline pivot and work that zone, or something like that! Look around use anything of power you can, just keep the safetey on i think. Just because we never use rigging gear for safety, i don't rule it out for making things easieer and safer, by stacking it on top of the safety procdeure. Sometimes that is even ussing a rigging loop runner for more stability, when still using lifeline.
Using this, i might mini notch the upward corner on baackside of to-be blocked, drape rigging line over to front, clove on back, place travel in mini-knotch on to corner edge of chunk. Then when lifelined to spaar low, i can use this (muenter in like BigJohn) for sawing the face comfortaably, then disconnect and guys have pull line.
Even if that load is leaning or whatever, past determining direction, any extra force will either make the chunk move faster (more force) or make it flex more hinge (less force), by bending with more fibre holding in hinge, depending on how much BackCut. i think a cut slowly giving to pulling pressure on hinge is best to deliver with most guidance and lowest force riding on hinge, wether felling, chunking, rigging sideways, rig pulling up etc. Using the hinge longer and stronger graants more control over ddirection and force. For least shock i think the load shoud ride the hinge as long as possible, with as much hinge. Placing the line over the top puts it in aboulutely the best location for leverage on the hinge to affect this, by challenging it more, to make it stronger in response. The diffrence of a load seperating at 1:30 or 4o'clock from the hinge can be immense. Also any force on hinge is 1xForce on spar, force on pulley support line is 2x at same point on spar!
The AM sponsor's technique about using the lifeline as support to more comfy service face, precuts in a SRT (though you can't set rigging's lacing cuz LifeLine goes under it)with bowline choked around spar and then pull bowline open remotely and let lifeline slide down on below facing where it goes anyway is pretty slick. But, you can't preset the lacing with it (cuz LifeLine goes under it, and there isn't a pull ine left for aiding in rotating the chock as far as possible on the hinge to reduce ShockLoading to the rigging system.