This build is designed to be a well-rounded melee powerhouse. AC will be unmatched in this build (at least among builds that don't include PnP Shifter), and damage output will be excellent as well thanks to Elegant Strike, Insightful Strike and Lolth's Meat all being applied to TWF.
What this build gives you: extremely high AC capable of breaking 60 without any equipment, armor, or buffs; full BAB; dexterity bonus to attack, AC, and damage (weapon finesse and elegant strike); intelligence bonus to AC and damage (canny defense and insightful strike); damage, attack and save bonus that stacks with each kill (lolth's meat); perfect two-weapon fighting; good scaling SR (drow).
Weak points: no healing to speak of making this build a good candidate for equipment with regeneration; saves are nothing special - I would prioritize equipment that offers increased saves and immunities for this build.
Build Name: Drowtrageous
Race: Drow
Alignment: Any nonevil
STR 12
DEX 20
CON 10
WIS 8
INT 16
CHA 10
Lvl Class
1 Swashbuckler 1: Weapon Finesse, Dodge
2 Swash 2
3 Swash 3: Exotic Weapon Proficiency (Elven Thinblade)
4 Swash 4: 21 DEX
5 Swash 5
6 Swash 6: Mobility, Tumble 5, Perform 3
7 Duelist 1
8 Duel 2: 22 DEX
9 Duel 3: Medium Armor Proficiency
10 Duel 4
11 Duel 5
12 Duel 6: Heavy Armor Proficiency, 23 DEX
13 Duel 7: Lore 2, Persuade 4
14 Duel 8
15 Duel 9: Expertise
16 Champion of Correlon 1: B: Improved Trip/Improved Disarm, 24 DEX
17 CoC 2
18 CoC 3: Improved Critical (Rapier)
19 Duelist 10
20 Swash 7: 25 DEX
21 Duel 11: Lolth’s Meat
22 Duel 12
23 Duel 13: B: Two-Weapon Fighting
24 Duel 14: Oversized TWF, 26 DEX
25 Duel 15
26 Duel 16: B: Improved TWF
27 CoC 4: Daylight Adaptation, B: Greater TWF
28 Duel 17: 27 DEX
29 Duel 18
30 Duel 19: Perfect TWF, B: Great Dexterity
31 Duel 20
32 Duel 21: 29 DEX
33 Duel 22: Epic Fortitude/Will, B: Great Dexterity
34 Duel 23
35 Duel 24
36 Duel 25: Great Dexterity, B: Great Dexterity, 33 DEX
37 Duel 26
38 Duel 27
39 Duel 28: Great Dexterity, B: Great Dexterity
40 Duel 29: 36 DEX
Note, make sure to buy off the drow level adjustment as soon as you can (level 6 and 9). For all this build's abilities to work you must 1) not wear any actual armor (clothes with an AC bonus and robes are fine) and 2) have fighting defensively turned on (enabling sticky combat modes is recommended).