Proof that you do not have to have 200K+ DPS to farm MP10. You do, however, need very high DPS to farm MP10 efficiently! In this video you see a ~157K DPS Whirlwind Barbarian earn close to 7,000,000 experience in about 7 minutes.
Given the DPS doing this on a lower monster power, such as MP7 or 8, would probably be a much better choice. Kill speed is a major factor when you want to farm legendaries or experience. I normally just run MP5, however after this run I think I will start doing Weeping Hollow runs as shown in the video on MP7 instead.