Let's start.
Good Level 1 spells, pick what you like:
Fist of Stone, SpC version. +6 to Str for the purposes of calculating AB.
Magic Missile, for use with Fell Drain Spell. It's like handing out candy, except the candy is negative levels.
Power Word Pain. Cast it, extend it, then run away for a bit while the enemy dies.
Shield.
Level 2:
Wings of Cover. Say "no" to one attack as an immediate action. This is incredibly broken.
Alter Self. Small Str or Dex bonus that stacks with enhancement bonuses. Gives Darkvision, Low light vision, Scent, or a Swim speed for 1 min/level. It' still pretty useful.
Level 3:
Shivering Touch. Oh god, Shivering Touch...
Sleet Storm. Effects not dependent on your casting stat.
Fly.
Haste.
Ray of Exhaustion: Hit them twice and they become exhausted no matter what.
Level 4
Phantom Steed. Moves really, really fast.
Dimension Door.
Black Tentacles.
Wall of Ice
Enervation
Level 5
Wall of Stone
Wall of Force
Transmute Rock to Mud
Feats:
Arcane Strike is a must. Practiced Spellcaster for the lost CL, Power Attack for fighting, and Combat Casting as a prerequisite.