Epswitch

After a moment Epswitch says, "Well we have more rope, right? I'll climb up till I have a place to stand on the ledge and then lasso something up even higher, just like Gil did here."

Epswitch takes the rope and puts a few knots in it, then makes the lasso so he has it handy one he gets to the ledge.

(1d20+2)[22] Climb to the ledge at the top of the rope. (not sure if I need the roll, but it doesn't hurt)

Attach a piton to the stone. Transfer the lasso from the stone to the piton.

(1d20+1)[19]Lasso the top(another 30 feet).
(1d20+1)[2]If the lasso falls(miss by 1-4), try again

Don't climb yet, but tie the bottom of the new rope to the piton as well(that way if the top lets loose, at least the bottom is attached and I don't fall really really far)

(1d20+2)[3]Climb up to the top (again, not sure if I need it given the wall and knotted rope).