Here are a few of my favorites that have not been mentioned.
Color spray-knock unconscious,blind or stun enemies
displacement-bad AC no problem attacks only hit 1/2 the time
slow-never worry about trying to keep your enemies from getting away to warn others
haste- if you are worried about enemies making saving throws beef up your friends
(minor) globe of invulnerability- archers stay by my side we need not worry about fireballs and magic missiles