First of all, sorry for my bad English. I am no native speaker and dont have the english version. So hopefully I spell everything right. I build this character a while ago in a slightly different setup. It was made for a persistent world where you cant just bash chest, but have to pick the locks to get good items. So i need quite a lot Rogue levels to get all the skillpoints.
Race: Human to avoid exp penality. Halfling or Elf is possible if you drop one feat and 3 points in set traps.
The starting Stats are: Str: 10, Dex: 18, Con: 14, Wis: 8, Int: 14, Cha: 8. all points go to dex when you level up.
Final Skills: Discipline (42), Tumble (40), UMD (41 to compensate the cha mali), Hide (30), Move Silent (30), Pickpocket (20), Open Locks (43), Disarm Traps (43), Set Traps (5) Search (43) + 40 Rest Take the skillpoints at the levels when they are classskills. So Discipline at Fighter and Cot level and save the rest for rogueslevels.
Weapons: 2 Short Swords or Dagger if you are a Halfling.
Levelprogress: 1-6 Rog - Toghness, Dodge, Weaponfiness, Weapon Focus 7-11 Fgt - Knockdown, Ambidext, Imp. Knockdown, Weapon Spec. 12 Rog - Two Handed Fight 13-19 CoT - Imp. Two Handed Fight, Blind Fight, Expertise, Imp. Expertise, Imp. Crit. 20 Rog 21-22 CoT - Greater Dex I, Epic Weapon Focus 23 Fgt - Epic Weapon Spec 24-38 Rog - Greater Dex II, Def. Roll, Greater Dex III, Imp. Evasion Greater Dex IV, Epic Dodge, Self Concealment I-III 39 CoT - SC IV, Armor Skin 40 Rog - SC V Take the feats in that order they are listed. Some may need others first.
Final: AC: 31 (10 + 8 from Thumble, 11 from Dex, 2 from Armor Skin) AB 40/35/30/25 + 40/35 with 2 Short Swords Saves: Fort 28/Reflex 39/Will 20.
Those numbers may not be that outstanding but you will profit a lot from buffs and items. After all you are the lockpick of the group .