Rogue Engineer

 skills are taught by Styx in the Slums of Levant.

Tier 1: Universal Skills
The universal Rogue skills can be acquired by anyone, without having to learn the class breakthrough skill.

Tier 2: Breakthrough Skill
Learning this skill will let you learn more advanced Rogue skills, but keep in mind that you can only specialize in three classes and your choice of specialization is permanent.

Tier 3: Specialization Skills
More advanced skills for those that specialize as a Rogue. The skills Pressure Plate Training and Stealth Training are mutually exclusive - when you choose one you can never learn the other.