So, in the game I'm GMing there's been some talk with one player about replacing their character with something more valuable in combat (they're a rogue, they're good at traps and not much else). I also recently introduced an atomie NPC, who's ambition in life is to be made a medium sized creature, so full sized creatures will respect her more. After talking it over with the player, we decided that she will take over the atomie once she achieves medium size.
So, the question becomes, how do I translate atomie stats into a PC that doesn't end up over or under powered?
What I've done so far, is given her a +2 in dex and cha, and a -2 in strength (following the custom for non-human or half-human standard races), and changed her fly speed from 50ft to 20ft (they're at the level where the sorcerer can cast fly on anyone whenever anyway, so I'm not too worried about it being an issue). Should she keep any atomie spell-like abilities? Does she need any other racial traits? Should I keep or take away fey DR/cold iron? What are your thoughts?