I'm currently building an Arcane Trickster that I'll be using in both a home campaign and as a PFS character(obviously seperate exp ect.). The main focus for this build is going to be ranged touch damage through Snowball or Scorching Ray(switching to fireball at Arcane Trickster 10), while also getting sneak attack every time. This is obviously difficult at earlier levels, but should be easily accomplished by my second or third arcane trickster level(6th or 7th level). The current build is wand based, but I have a few ideas to improve upon it and I'm wondering what the best option will be.
Azata-Blooded Aasimar
Cast Glitterdust 1/day(2nd Level Arcane Spell)
Stats
Str 10
Dex 16(14 Base + 2 Racial)
Con 10
Int 14
Wis 10
Cha 18(Base 16 + 2 Racial)
Class/Level Class Abilities/Feats
Ninja(1) 1: Skill Focus(Stealth)/Poison use/Sneak Attack 1d6
Ninja(2) 2: Ki Pool/Vanishing Trick
Ninja(3) 3: Eldritch Heritage(Shadow)/No trace +1/Sneak Attack +2d6
Sorcerer(1) 4: Arcane Bloodline(Bonded Wand)/Eschew Materials
Trickster(1) 5: Iron Will/Ranged Legerdemain
Trickster(2) 6: Sneak Attack +3d6
Trickster(3) 7: Feat/Impromptu sneak attack 1/day
Trickster(4) 8: Sneak Attack +4d6
Trickster(5) 9: Feat/Tricky spells 3/day
Trickster(6)10: Sneak Attack +5d6
Any additions/improvements on the current build are welcome, but I feel this build might be better with different bloodline(s). Some options I feel might work are crossblooded(Orc/Draconic) sorcerer, straight evocation tattooed sorcerer, or ditching wands and grabbing either a ring(to be built into Ring of Invisibility) or a familiar. I realize damage based casters aren't the norm, especially when combined with the AT, but I feel I'll enjoy playing it. That being said, please refrain from posts like "AT sucks", "You should focus on control spells", or "Wizard is the only viable AT".
It's a bit old but[url="http://paizo.com/threads/rzs2o3ow?Another-Arcane-Trickster-Guide#1"]this might help you.
There is nothing wrong with a ninja/sorcerer/arcane trickster.