Wizard and Barbarian are allies.
Wizard uses a lesser rod of reach to cast a Fly spell on the Barbarian who is 15' away.
Our GM ruled that the wizard had to make an attack roll in order for the wizard to touch the barbarian.
Does this mean that the willing ally of the Wizard is for some reason trying to avoid a beneficial buff spell from his party member? Wouldn't it succeed no matter what if the Barbarian is willing?
Does the Barbarian have to add his Dex Modifier to his touch AC? If yes, why and what page is that rule on? If no, why and what page is that rule on?