Meph has an almost exponentially better drop rate than Pindle, so I would suggest you buff up your sorc if possible.

Hell Andariel also has a good drop rate. She's dropped me a few Bonehews and various other elite uniques.

Other people have advice on where to MF as well. Kuja swears by Hell Travincal and other people say Minions of Destruction are good as well. Pretty much any high level superunique/act boss has the potential to drop really well.