I know the most important stat is precision for light, but for plans which should i buy? There is Precision and Might. power, dominance, health.
I have precision/power and might/health on mine. I try to keep precision and might equal. I'll be changing some of them as I now have precision/might 4.
I go for Prec/Vit on most of my mods. That gives me two benefits: 1) Even in DPS stance, I regenerate my power fast enough that I can put out a good damage even if the troller/s is leaving me/us short of power output. 2) I can switch to troll while keeping my DPS gears, and effectively troll most content while killing adds almost as fast as the second/tertiary DPS, which makes the instance in case go faster. This said, I have to say that Prec/Vit is also a choice of mine because althoug I COULD socket a pure Prec/Prec&Might mod on my yellow sockets, sometimes the color synergy benefit gives me more than those plans do.