1. Class & Mastery Selection

First, a random Base Class (Mage, Rogue, etc.) is chosen. Then, one of its three Masteries is randomly selected.

2. Core Skill Selection

The "Core Skill" is randomly chosen from the entire skill list of the selected Mastery. This ensures the build is centered around a thematic and powerful ability from that Mastery.

3. Additional & Mulligan Skills

The remaining four skills are picked from a valid pool containing:

• All Base Class skills.
• All skills from the chosen Mastery.
• Only the low-tier "Shared" skills from the other two Masteries in the same class (skills available before the passive point lockout).

4. Traversal Skill Guarantee

To ensure every build is mobile, the logic checks if any of the five chosen skills have a traversal tag. If not, the "Mulligan Skill" is replaced with a randomly selected, valid traversal skill.