Expertise

Overview

 * Expertise is the primary Attribute of Rangers, and thus only accessible to them.
 * Expertise reduces the energy costs of Attacks, Glyphs, Nature Rituals, Preparations, Stances, Shouts, Traps and all other non-spell skills from any profession at a rate of 4% per point.

Skill Cost Modification By Expertise
Same data displayed differently to show its pattern of "-1 pyramids":