When seeking advancement to Wizard in the Mages Guild the player needs a Wizard's Staff. Mainland guild members will still direct the player to a cave near Dragon Fel, which can be ludicrously far away for them to have heard of (in-fact, the vanilla dialog here doesn't actually mark Dagon Fel on the map, making it even more absurd for people playing characters that never step foot on Vvardenfell). This seems like a simple place to add another "free" Wizard's Staff for the player to be directed to if they seek advancement in a guild on the mainland (or at least southern mainland. Firewatch and maybe Helnim are close enough to keep the vanilla suggestion.).