In the Northwest Corner of Sparkfly Fen there is an area named "Ocean's Gullet". Every 2 - 3 minutes a champion mob named "Champion Risen Megalodon". His rewards are 5k+ exp, 400+ karma, and 1.3 silver. Unfortunately when he spawns he can roam north or south, SO if enough people zerg him Veteran Skelk style it might be possible to farm this guy, the only issue is that he's a shark and a champion, so water + hard hitting.