In the Underweald, ring 98, the quest The Webbed Tunnels offers very little XP as a level 8 quest, despite the danger it poses. As of my last count, as a level 8 pure class, this quest only gives 67 XP.
I think it could stand to be increased to 200 XP, like other harder level 8 quests.
In addition, the random spawns in 99, that can be found in the Water Garden, give an XP payout similar to The Webbed Tunnel quest.