The class advancement options available to someone usually depend on their condition and path leading up to that point. This is even more pronounced for a Lord, who practically has access to far greater resources and power than a typical Awakened individual.
Take Atlas, for example, reaching Rank-2 in less than a year, and already in his third battle season. That alone was a remarkable feat by any standard.
Every factor is taken into account: talents, skills, specializations, and more. These shape the class options that appear, allowing a person to choose a path aligned with how they've developed so far. Just like when Atlas in the past chose to focus on Water and Lightning elements.
In the end, he found himself consistently blessed with items leaning heavily into Lightning through his gacha pulls. He even had the Nimbus Carriage, an artifact with a distinct Lightning theme.
