Jaina makes her own bling.
Deals elemental damage.
Strong vs Armored.
Frost damage slows enemy movement and attack speed.
Increases the Level of your Spells by 3 while Jaina is in play.
Periodically teleport away from melee attackers.
After deploying, if the next mini played is a Spell, it costs 1 less (but no less than 1.)