I've read lots about people using different methods to claw their way to the top of the leagues. Using simple lessons and stories to gain a quick XP boost. But having just found and practiced my beloved "follow the arrows" story, I realised there were words and phrases there that I once knew very well but have forgotten since the story was removed.
I've made my account private now. I've been number one in the diamond league etc but was finding the preoccupation with the league a distraction. Now I can remind myself about any story or tree part at will without fear of being labeled an "XP tart" 