I would like to suggest a flying broomstick mount, It doesn't solely have to be class exclusive, but if so I think it would fit Witch's, Wizard's, and Sorc's best. The idea is to have a special mount vendor kind of like how Shai has that one npc Artina that sells instruments, well you could put a special NPC in lets say Tariff, obviously because it's filled with the most magic, and said NPC will train, and sell you brooms, and possibly other magic related items, outfits, pets, etc....

There could be three main ways to ride a broom I will link a few images below for reference, First Image: Focused, Second Image: Relaxed, and third Image: Standing. You could even make it two seater if you wanted, or let cats ride on it, anyways this is my suggestion I hope someone at PA sees's this, and or cares. Have a great day.

your idea sux