I second this. Don't do pyramid plunder or whatever else people are suggesting, theiving guild is super fast. I went there to get 53 for DT, and then later 66 for Temple at Senn and its incredibly fast.
Just pick the cage locks & open the chests repeatedly, and when you are high enough level then knock guys out with rubber blackjack and loot them 3x before they recover. Its amazing exp.
Thanks guys, im doing pyramid plunder now i really cba to do another quest today. I have done The Feud and Tourist Trap for exp. Pyramid plunder is pretty fast.