Disclaimer: bottom right few heroes were NOT in the calculated version by DotaMetrics, therefor I did not include them. If/when DotaMetrics recalculates these farm dependency heroes I will redo the layout.
Full credit of research goes to: http://dotametrics.wordpress.com/2013/01/21/the-dota-2-metagame/
In Who is the Most Farm Dependent Hero?, I attempted to measure CS scaling. While there are some issues primarily rising from the small sample size, shifts in how Normal/High/Very High play the game, and emerging trends during 6.74 (Bounty Hunter is likely too high, for example, and Tiny is likely too low) I’m generally pretty happy with how it turned out.