From East Ronfaure travel to K-4 and enter Ranguemont Pass. (As a note if you are lower level sneak and invis of some sort is highly recommended for this entire trip.) Travel through Ranguemont Pass from G-12 where you enter to L-4 and exit to Beaucedine Glacier. The Glacier is confusing without a map so I would recommend either doing the quest for it beforehand or using ffxiclopedia as a resource. Upon exiting Ranguemont Pass travel to H-9 and take the ramp north up to the next level. From there travel north to H-7 and take the ramp west up to the higher level. After that travel north and west to F-6 and zone into Xarcabard.