i think you meant pro-formance.
i like the Kong double ascender; with a sling to place the non-pantin foot in dangling from it's attachmeant krab. Backed up by a VT type hitch, that is then easily converted into a self tending Sailor Gripping type hitch after ascent. This gives more of a walking type balance of power. The 2 handed hold keeps CG more in inline without chest roller or ascender IMLHO. Non-inline CG; increases the work effort i think.
i like running bowline to support; instead of 2/1 d-effect of trunk anchoring. If not ascending to the TIP; i'll place a krab on the end of a rig line into the DBY; to pull it open and down to me after lanyard (and maybe rigging sling) connection. Double connection is not all ways about fail safe; but sometimes most use is for maintaining balance; so you don't use/test safety line(s) in my book. Only things not in balance of pulls/pushes move; until they find/are satiated by such balance of forces/equal and opposite matching of forces. The movemeant is just the residual of the unmated forces; unless tourquing in concert...
The Pantin can also be used for standing on the rig line on ground control's side for helping pretighten with body weight or it's impact. Reaching over to the load side with hand; then gives 2:1 of the hand lift effort added to the body wieght pretightening. Pushing down with leg instead of pulling up with arm, makes the arm give the equal/opposite responding force of the leg lift input; for 2x leg lift + bodyweight pretightening. If this doesn't effect load/flexxing it up/modifying it's distance; then these forces just go into preloading the elasticity of the line. So in that case it is best if the line is elastic, and you are about half way between load and support with these ant-ics.