Celtic Heroes

Up to what lvl is the xp good for? The sent was good until like lvl 143, anyone who continued and knows if its worth it?

By the end of the quest line Denwal?? The Mad, in the sewers, has 3 repeatable quests, I think it was only one which gives over 100k xp. They aren't as quick to complete as sentinel, I remember one of them required killing some 3* mobs which do not spawn often, so took a long time killing other mobs to get the 3*. Didn't find out where the xp dropped off, but definitely good beyond 143.
The spirit warden in OW has a couple of new repeatable quests too, but I remember them as being a lot slower to do with only average xp.
Definitely worth doing. Head over and compete the quest line. Then work out which of the repeatable quests give best xp against time spent to do.