Advantages of Mages over other races.

Here, Jalib is useful because he also has his own mirror, with a 40% chance (and an additional 1% per level) to redirect a spell towards an enemy or any other target)... and if you consider that other mages' mirrors don't trigger as often, then Jalib only needs Sandro's cloak and a spellpower of around 45 to be effective in battle.