Dual-wielding isn't practiced underground, but the weapon master skill is useful for everything else. Yes, you can use a two-handed weapon or a one-handed weapon and a shield. Ivalai, by the way, traditionally use one-and-a-half-handed swords without shields.
Если где-то чего-то убудет, то в другом месте добавится.
(Закон сохранения).