the dex based is nice, the +3 to damage is nothing when you can start slinging spells.
Beyond the core and agp, the dex build would work nice with the dervish dance feat from the Qadira book
-
Dervish Dance (Combat)
You have learned to turn your speed into power, even with a heavier blade.
Prerequisites: Dexterity 13, Weapon Finesse, Perform (dance) 2 ranks, proficient with scimitar.
Benefit: When wielding a scimitar with one hand, you can use your Dexterity modifier instead of your Strength modifier on melee attack and damage rolls. You treat the scimitar as a one-handed piercing weapon for all feats and class abilities that require such a weapon (such as a duelist’s precise strike ability). The scimitar must be for a creature of your size. You cannot use this feat if you are carrying a weapon or shield in your off hand.
-
Then you could maximize your dexterity's usefulness.
For this class, I don't see strength as much of a benefit as compared to the dex benefits, and with a 10 for strength you can shift them into a nicer stat like Int, Con or Wis.