Originally Posted by
Kurald Galain
Well, there's your problem.
Enlarge Person doesn't increase your offense by much, breaks your defenses, and makes you a big target (in addition to not being usable in spell combat). Try Long Arm or Frostbite instead.
Shock Shield is an inferior version of shield, since its shock (1d6 damage save for half) is not going to impress anyone. Try regular Shield instead, or Vanish.
Also, depending on the opposition, consider opening with Color Spray or Grease instead of buffing yourself. Because buffing gets a lot more impressive if you've got 2nd or 3rd level spells to do it with.