The original Kessel Run starts sitting/crouched matched on the smiley face crimp in the overhang. Trend up and left to topout. Starting with a pre-placed heel can ease the difficulty. Starting to the right is a different and easier variation.
Idk if you have to sit start it but there's no way I'd be able to do so without stacking pads. Don't follow my beta cause I lost my heel and was just faffing about