If I understand correctly, it refers to a hero with 1 "line" (basic) without other skills taken... (that's why an archmage is simply impossible)
in this case, I'm for a "strength-based" hero, preferably an archer-naturalist :)
Although, as a multi-class, the archmage is great :smile44:
P.S. All heroes who, when combining 2 skills, receive a charm or immunity (fire guard) are very effective:)