I don't really remember the specifics about the areas leading up to 951; I think there was a quest or two that is required and possible 2 or so levels of sub-levelling(which is not really a big issue during xp events).
Once you get to 951, if you have not done all the required quests you will need to portal back to krul and then portal back to karthak master realm; next:
Merchant Quarter -> City Park -> North Gate -> Here you can level from 951 to 967 ->
Seastone keep for 967 -> Seastone Court for 968 -> Seastone Library for 969 ->
Furnace room for 970 -> Volmar Wastes for 971 or Might need to sublevel to 972 and then portal to Mount Volmar (not sure about that)