I don't think you can settle on a number of Wins needed from acquisitions and get to a competitive state. Whatever number you think the team needs between 6 and 20, the variance is all tied to the current roster, not the additions. We just witnessed the Red Sox go from 69 wins to WS in one year and a lot of noise is made about the guys they added in the off-season. But the truth is the improved WAR collectively from existing players (Ortiz, Pedroia, Ellsbury, Buchholz, Lester, etc) was substantial between 2012 and 2013. The Cubs don't have the same situation as the Red Sox had in 2013, which is a group of proven talent rebounding from 2012 injuries or bad seasons to yield big gains in WAR year over year. The Cubs need Jackson, Samardzija, Castro, and Rizzo to add double-digit WAR collectively over 2013 numbers to sniff a competitive record no matter who is added to the roster. If I'm advising the GM my primary focus is on Tanaka, regardless of 2014 value. The age and years line up with the progression of the 19-23 year old talent in the minors to stay prime through the growth window. That may be the only splash of the off-season I would care about, all other options for me get relegated to plan B, C, or D.