Eskard drops the rope, jumps off the ledge, draws his sword, and attacks 'box'.
I think i can Spring attack. Jump is part of a move action though. Either way: dodge on 1, Jump +14. Try to be 5'SW of the box.
If SA: No AoO's, Atk 1: +13 / 2d6+8, then south as far as possible.
If no sa: AC...