Acid Arrow is awful. Consider Orb of Acid (SpC 150). Close range, single target d6 acid damage, still Conjuration and SICKEN. Now THAT is a worthwhile draw.

I have alternative suggestions for a few of the hearts. italics is reordered; bold is changed.

Ace of hearts: Magic Circle against Evil
King of hearts: Cure Critical Wounds
Queen of hearts: Magic Vestment
Jack of hearts: Spiritual Weapon
10 of hearts: Protection from Energy
9 of hearts: Hold Person
8 of hearts: Vigor (SpC 229; target gains Fast Healing to for 10+1/CL rounds (min5))
7 of hearts: Sanctuary
6 of hearts: Bless

5 of hearts: Shield of faith
4 of hearts: Lesser Vigor (SpC 229; target gains Fast Healing 1 for 10+1/CL rounds (min 1))
3 of hearts: Guidance
2 of hearts: Cure Minor Wounds