Wiz/Sorc Casting Time

[Twerpp]

Does a 13 wiz with one level of sorc get the faster casting/cooldown of a sorc on all spells? Or just first level spells? Or is it a ratio like wizardy items?

[GeneralDiomedes]

Only the spells you took as a sorcerer. This would not include the first level spells you memorized as your wizard. This would also not include spells which are on both lists but you are actually casting the wizard one you dragged onto your hotbar.