From the stream from http://twitch.tv/niwaar
This only gets easier as you train your muscle memory. The bottom of the puzzle is much harder than the top. The major issues with the puzzle are mostly brought on by trying to go two quickly and under jumping or by large Norn or Charr players preventing you from visualizing where you want to land on a jump.
A bit of a carry, but the video shows the correct path and how to deal with the Chaotic Portals "event" before the twin bosses of the mission.
Take note: We tried a few times to single pull the Lich but were unable to and finally decided to simply kill it while Shiro was beating on us. We then ran around capturing the Altars with Shiro beating on us until he mysteriously decided to stay at Grenth's.
Level 22 Castanic Ranger in the Bastion of Lok Dungeon during the second NA Tera Closed Beta Test.
Got booted by the girl midway through, but the instance was fun and short. Had to wait for the healer to come back from afk for a while.