[3.5E] Build help - Rogue/Sorc/Arcane trickster

[evnaz]

I can use PHB, PHB2 the complete series and the forgotten realms campaign books

My goal with this build is to basically play something fun but, not too strong
I'd like to be able to sneak attack off of ranged magic, I'd like to be somewhat of a stealthy utility mage if possible
Thanks for the help in advanced

[gorfnab]

Obligatory handbook link: Sneak Attacking Spellcasters (http://brilliantgameologists.com/boards/index.php?topic=1240)

Usually for this type of build you'll get more synergy and better casting out of Wizard. Usually I recommend in that case Rogue 1/ Wizard 5 (Spontaneous Divination ACF)/ Unseen Seer 10/ Arcane Trickster 4. Feats of note: Craven, Acidic Splatter, and Practiced Spellcaster.