just get ur lvl 20 player to eye of the north. Get all 3 primary quests from Ogden, Gwen, and Vekk for the Norn, Ebon Vanguard, and Asuran sides. Go to Eye of the north. Join a party that is doing Heart of the Shiverpeaks. Even though you do not have the quest you can still complete it with them. Upon completion you will be able to get Destruction Depths. After finishing destruction depths you will end up in Central Transfer Chamber.
Total Time from Kaineng, Lions Arch, or Kamadan to Central Transfer Chamber is 2.5hrs.