So, I've been thinking about this for a while... WAR gets us a decent aggregate of perceived production value, but that value is really only useful for major league players - the whole idea of projecting when and how much WAR you can acquire from a prospect or even a rookie is quite the crapshoot, even with comps to lean on.
That being said... I'd like to go through a group of 5 players at a time, and determine their values in the following categories. These values are going to be 1-10, with 10 being most value, Distribution of rankings does not have to follow any sort of normal distribution, but have the gaps between 4-5 and 8-9 for example be the same distance from a quantitative standpoint. For example, Darvish ability might be a 10... if nobody approaches that ability, then the next on the list should be an 8, or a 7, maybe (not saying that will happen).
Finally, all of these categories are inclusive of future value, as well, assuming no trades/Rule 5. So if it's a prospect, assume Rangers maintain control through all service time, then arb years. For arb players, assume control for remaining arb years. For post-arb players or contracted players through and past arb, assume their existing contracts.
If you need contracts for a reference, go here: https://spreadsheets.google.com/pub?key=tnXR4qeDSfeXu_Y-nA8ZPWA&output=html
Contract Value (including length of control considered)
Potential Variance (of Field Value)
Our first five players: