Would an Arcana devoted to the purpose of the spells rather than the nature or special effects be appropriate? Examples would be an Attack, Defense, Movement, Martial Arts, Base/Vehicle Building, Healing/Aiding, or Dragon-Slaying Arcana. Of course it would need to be more colorful and fit into the setting.
UPS - (Underhill Parcel Service) - A delivery business run by a group of Gnomes who have developed a specialized Movement Arcana that deals exclusively with spells that allow them to overcome all challenges and barriers that would prevent them from delivering their shipments on time: Gate Travel, Fleet of Foot, Bounding Leap, Bugs Bunny Burrowing, Pass Through Wall, Insect Climb, Walk on Water, Lighten the Load, Dolphin Fins, Summon Helper, Detect Delivery Location, Pass Unhindered, Tireless Journey, Freedom of Movement, Illusionary Bribe, etc...