Just thought I would ask this...
My favorite...
Priest: Shield of Lathander/Entropy Shield
Mage: Otilukes Resilient Sphere: Got someone losing HP fast, cast this on them, save there life. Plus stupid AI keeps attacking them, can't touch this.
Bard: Tensers Transformation: Talk about a fighter on roids!
Druid
: Stalker/Elementals