I made this build as an upgrade to my War Squared build. It focuses on the same three playstyles: 1) warlock invoking, 2) instant death attacks through PRC Vorpal, and 3) high damage output through martial maneuvers and damage boosts. You still get all those highlights plus Sweeping Strike, allowing you to potentially hit two enemies on every swing, and you only really lose 4 warlock caster levels and Path of Shadows (which no longer heals) in the bargain. Plus, the names of all the classes start with "War," which is cool.
What this build gives you: 17 pre-epic BAB; dual keen, vorpal kukris; great attack and damage bonus (Lolth's Meat and Blood in the Water); very high damage output - between Lolth's Meat, (Epic) Weapon Specialization, Two-Weapon Fighting, Epic Crafting, Power Attack (from Blooded), Sweeping Strike, Maneuvers, and Blood in the Water, this character can average ~5200 melee damage a round (~6250 if you begin combat with a pounce) and ~1600 on a single pouncing charge***; the damage caused by this build is persistent and not constrained by abilities limited to times/day; you also get an army of meat shield skeletons (The Dead Walk); immunities (Curst) and the ability to pass every save (Diamond Defense and Lolth's Meat); great spell resistance (Curst); at-will Creeping Doom (Verminlord); at-will 50% miss chance and invisibility (Retributive Invisibility), and before this you can get a 50% miss chance with Concealing Amphora, Greater; at-will healing for you and all your skeletons (Utterdark Eldritch Doom); healing once per minute when recovering maneuvers (Vital Recovery); at-will short-range teleport and my favorite ability for kiting (Flee the Scene); minor psionic powers, class ability buffs, and DR 2/- from War Mind; and tentacles!
Weakpoints: not the best AC - get equipment to boost AC (Curst and Blooded help with this as well); low saves on invocations, but only one useful invocation uses a save (Frightful Blast), so this really doesn't matter
Build Name: War Cubed
Race: Half-Drow
Alignment: Lawful Evil or Neutral Evil
Strength 16
Dexterity 16
Constitution 10
Intelligence 14
Wisdom 8
Charisma 10
Lvl Class
1 Warlock 1: Lolth's Meat, Invocation: Frightening Blast, Skills: Concentration, Lore, Spellcraft, UMD at each level (Blooded Template)
2 WL 2: Invocation: Eldritch Glaive
3 WL 3: Two-Weapon Fighting
4 WL 4: Invocation: Summon Swarm, 17 STR
5 WL 5
6 WL 6: Craft Magic Arms & Armor, Invocation: Eldritch Chain
7 WL 7
8 WL 8: Invocation: The Dead Walk, 18 STR
9 Warblade 1: Weapon Focus (Kukri), Stance: Blood in the Water, Maneuvers: Sudden Leap, Emerald Razor, Action Before Thought
10 WL 9
11 WL 10: Invocation: Flee the Scene
12 WL 11: Wild Talent, Invocation: Chilling Tentacles, 17 DEX
13 WL 12
14 War Mind 1: Psionic Power: Force Screen
15 WM 2: Improved Critical (Kukri), Psionic Power: Precognition, Defensive
16 WB 2: Maneuver: Pouncing Charge, 18 DEX
17 WM 3
18 WM 4: Improved TWF, Psionic Power: Prescience, Offensive
19 WM 5
20 WM 6: Psionic Power: Concealing Amphora, Greater, 19 DEX
21 WL 13: Invocation: Vitriolic Blast, Greater TWF
22 WL 14
23 WL 15: Invocation: Eldritch Cone
24 WL 16: Invocation: Eldritch Doom, Epic Weapon Focus (Kukri), 19 STR
25 WL 17: 28 Lore and Spellcraft, no more Spellcraft but I keep investing in Lore (not required)
26 WL 18: Invocation: Utterdark Blast (Curst)
27 WB 3: Craft Epic Magic Arms & Armor, Maneuver: Raging Mongoose
28 WB 4: Stance: Pearl of Black Doubt, 20 STR
29 WB 5: B: Vital Recovery, Maneuver: Diamond Defense
30 WB 6: Weapon Specialization (Kukri)
31 WL 19
32 WL 20: Invocation: Tenacious Plague, 21 STR
33 WB 7: Epic Weapon Specialization (Kukri), Maneuver: Time Stands Still
34 WL 21
35 WL 22
36 WL 23: Verminlord, B: Eldritch Sculptor, 22 STR
37 WL 24
38 WL 25
39 WL 26: Great Strength, B: Epic Extra Invocation (Retributive Invisibility)
40 WL 27: 24 STR
Readied Martial Maneuvers: Pouncing Charge, Raging Mongoose, Time Stands Still, and Diamond Defense
Notes: buyoff the LA from Blooded at level 3 - you can buyoff the LA from Curst, but it will only amount to about a 9% or less XP reduction by the time you take it. Taking Curst at 9 would allow full buyoff early and allow much more top-end XP for kukri crafting - the ones I'm using (+10, keen, vorpal, psychokinetic, sonic blast) eventually cost around 40k XP each... As a general strategy, this build should begin combat by charging the strongest opponent, initiate raging mongoose as soon as possible, then recover maneuvers, repeat. Once you get Time Stands Still, Pouncing Charge into an immediate Raging Mongoose on-hit (no action required), then immediately initiate Time Stands Still and then as soon as you see the first hit from Time Stands Still, recover maneuvers. Always make sure to recover your maneuvers immediately at/near the end of each combat - otherwise you will have to wait a full minute while they recover. You can use Power Attack to transform the attack bonuses you get from (Epic) Weapon Focus into damage - Lolth's Meat and Blood in the Water will keep you hitting on every attack. For super tough, crit-immune enemies, you can drop several Creeping Dooms, let them build up to high damage, then kite the bad guys through the AOE while it slows them to a crawl.
***Damage calculations updated after the scripted combat system was updated to pull in all the damage boosts. They assume max level, that enemies are not crit-immune, Sweeping Strike hitting something on every swing, and +20 damage from Lolth's Meat (which seems like a good average that I am doing in combat-heavy modules).