The reason behind this is how the mechanical part of skill scaling works. Basically, skills that scale off weapon damage will also scale with the weapon required stat. This works just fine in Warfare, because it makes sense that the skills get stronger, the stronger the weapon you use. Also works in Huntsman and Scoundrel, however, Hunstman requires Bows and Crossbows, while Scoundrel requires Daggers. So if a character using a wand, for example, hover through Huntsman and Scoundrel spells, they'll see not only them dealing elemental damage, but also scaling off INT.
