Using the proper combos with weapon transformations inbetween helps a lot. Way better then hiting R1 R1 R1 R1 R1 R1 in one form. Can even use the kirkhammer with them (starting combo with sword).
Can anyone help me here ? http://www.neogaf.com/forum/showpost.php?p=157736635&postcount=6447 (stuck in Old Y)
I think you're missing a path right next to the shortcut. Go down the ladder, should be another path very near it.