In my headcanon, Cassus Fett armor is a Beskar armor with golden dye. Ali my mando'ad in this game have beskar in their mandalorians armors.

Ulic and Surik were two of the best jedi in his time. For example, Coleman Trevor vs Canderous Ordo(Mandalore), Coleman died. Kenobi vs random mandalorian, mandalorian died. What matters is the ability.