I think Easton's chart and Shaft Selector Program are both a bit to the stiff side, which ain't exactly a bad thing I suppose.
For example, I shoot a 30" 2413 3-4" vanes, 125 grain point with all my bows from 51-60lbs@29", as the chart specifies. It's a good average but works best with the heavier stuff.
My gut tells me a 30" 2213 should work well(I have a bunch), but the Easton Chart shows it way down around 40lbs. Many shoot 2018's at around 50lbs, but the chart shows them even lower...