I found that killing mobs and the wrapper quests for the missions in Annak-Khurfu and Vernozal give little to no rewards either. Doing the missions, and the tasks at Task Bulletin Board otoh provide a visible and quite remarkable boost. If you have a number of alts at Moria or higher level, and can hand them a stack of task items, you'll move the bar quickly.
Greetings, Polymachos
Räuberhöhle auf Belegaer, Breelandsiedlung, Ochsbott, Lange Straße 5. Vorsicht, Fallen!
Awkward Anomalities Arena in Breeland Homesteads, 6 Long Street, Ersward (Landroval) - Elderslade under attack!
Scared people tend to follow the flock, no matter which shepherd it has