Post your sources claiming her overall endorsements were a "wash".
She didn't "pick" candidates, she endorsed them and has had a very good record.
http://usconservatives.about.com/od/sarahpalin/tp/Sarah-Palins-Winning-Endorsements.htm
Of the 27 candidates Palin endorsed in 2009 and 2010, 22 of them earned victories
4. Chris Christie for New Jersey Governor (Special Election)
8. Carly Fiorina for U.S. Senate in California Before Palin's endorsement, Fiornia had a very tough primary battle with Chuck DeVore, a Tea Party-backed California Assemblyman
14. John McCain for U.S. Senate in Arizona
25. Kelly Ayotte for U.S. Senate in New Hampshire
You can also add in her support of Richard Lugar in his primary battle, which he thankfully lost.