I echo the sentiment for those alt. miniatures!
The Magister can't use a flail so no reason to equip him with one.
I used the same GW sorcerer for one of my magisters as well. It is a nice looking model, sadly ruined by an identical face used 8 times (3 on staff, head, back, 3 on familiar)! The familiar is particularly unforgivable, its an exact copy of the staff!! They could have re-released the classic familiars and packaged a random one...
I chopped off the topmost on the staff and sculpted a classic wizardly looking swirl of knotted wood around a crystal ball.
Also we allow a new weapon, available to any warband with with clubs. (From LoD4):
Staff: 10gc (common), parry, concussion, two handed.