IIRC, the save for Chromatic Orb was specifically at +6 -- it's meant to be a spell that the target usually saved against.
-- Nifft
PS: But I'd still never allow it to do the full range of powers. Hmmm..... okay, here's my 3.5e version:
Chromatic Orb
Illusion (Figment, Pattern) [Mind-Affecting, Chaos]
Level: Sor/Wiz 1, Brd 1
Components: V, S, M
Casting Time: 1 action
Range: Close (25 ft. + 5 ft./2 levels)
Target: 1 creature
Duration: Instantaneous
Saving Throw: Will partial
Spell Resistance: Yes
This spell causes a pulsating orb of scintillating color, four inches in diameter, to shoot forth from the caster's extended fist. If the orb strikes a creature, the creature takes 2d4 damage, and must make a Will save.
If the creature makes its saving throw, the damage is subdual.
Should the creature fail its will save, the damage is of a random type, and the creature suffers an additional effect, depending on the roll of a d4:
1: Cold, Paralyzed for 1 round
2: Fire, Blinded for 2 rounds
3: Electric, Stunned for 1 round
4: Acid, Nauseated for 2 rounds
Material Component: 1 GP rhinestone. However, if a 25 GP (or higher) gem is used, the spell causes double damage, and its addiitonal effect lasts twice as long.