Conditioned ranger help
Sinister stat is condition damage, power, precision. And unfortunately you can’t use sinister for condi rangers. In order to maximize a condi build’s dps, you need to max out condition duration, which gets increased by gear that give you expertise stats. Certain classes like engineers and warriors get traits that increase the duration of their conditions (engineer’s chemical rounds trait increases all condition duration by 50%. Warriors get bloodlust and king of fires which increases bleed and burn duration by 33%). Unfortunately rangers don’t get such traits so in order to hit 100% condition duration, viper gear is absolutely mandatory.
Vipers would be a great choice if raiding was your thing. However, if your the more solo type doing general PvE stuff, I would go with Dire stats.