Template:Class progression
As a player progresses with their primary archetype, they will have the opportunity to choose a secondary archetype to augment their primary skills with effects from their secondary archetype.[1] The combination of primary and secondary archetypes is referred to as a Class.
For example: If a Fighter were to choose Mage as a secondary archetype, the fighter would become a Spellsword. This combination opens up augments that can be applied to skills in their primary skill tree. Fighters have a Rush skill that allows them to rush towards a target; and upon reaching the target, deal an amount damage with a chance to knock the target down. A Mage's escape augment could be applied to the rush skill, which would now teleport the player to the target; thus eliminating the charge time on the skill.
Each skill in the primary tree will have several augment options from the secondary tree. This is an example of horizontal progression.