I play a 39 balance druid...I would just suggest the following rule:
1. Max spell power for hots and dots, plus talents and glyphs that support that style (Genesis, Glyphs of Moonfire and Insect Swarm, etc.)
or
2. Crit rating for Starfire/Wrath spam, plus glyphs and talents that support that style (Nature's Grace, Glyph of Entangling Roots)
Most of the cookie cutters are build 1 style, but I do play build 2 and love it. I'm just hoping 3.1 doesn't mess up 39's too much.