Drow Ninja Assassin Build (Please Review)

[Ashiel_Dragmire]

Is this build viable/workable?

Character Plan by DDO Character Planner Version 3.5.1
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Level 20 Lawful Neutral Drow Male
(7 Monk \ 13 Rogue) 
Hit Points: 258
Spell Points: 0 
BAB: 14\14\19\24
Fortitude: 11
Reflex: 19
Will: 12

                  Starting          Feat/Enhancement
Abilities        Base Stats          Modified Stats
(28 Point)       (Level 1)             (Level 20)
Strength             14                    16
Dexterity            16                    23
Constitution         12                    14
Intelligence         14                    16
Wisdom               14                    16
Charisma             10                    12

Tomes Used
+2 Tome of Strength used at level 7
+2 Tome of Dexterity used at level 7
+2 Tome of Constitution used at level 7
+2 Tome of Intelligence used at level 7
+2 Tome of Wisdom used at level 7
+2 Tome of Charisma used at level 7

                  Starting          Feat/Enhancement
                 Base Skills         Modified Skills
Skills           (Level 1)            (Level 20)
Balance               7                    29
Bluff                 0                     5
Concentration         2.5                  12
Diplomacy             0                     1
Disable Device        6                    26
Haggle                0                     3
Heal                  2                     3
Hide                  7                    35
Intimidate            0                     1
Jump                  6                    11
Listen                2                     5
Move Silently         7                    35
Open Lock             7                    29
Perform               n/a                   n/a
Repair                2                     3
Search                6                    28
Spot                  6                    28
Swim                  2                     3
Tumble                4                     9
Use Magic Device      4                    24

Level 1 (Rogue)
Skill: Balance (+4)
Skill: Concentration (+1.5)
Skill: Disable Device (+4)
Skill: Hide (+4)
Skill: Jump (+4)
Skill: Move Silently (+4)
Skill: Open Lock (+4)
Skill: Search (+4)
Skill: Spot (+4)
Skill: Tumble (+1)
Skill: Use Magic Device (+4)
Feat: (Selected) Dodge


Level 2 (Rogue)
Skill: Balance (+1)
Skill: Concentration (+0.5)
Skill: Disable Device (+1)
Skill: Hide (+1)
Skill: Jump (+1)
Skill: Move Silently (+1)
Skill: Open Lock (+1)
Skill: Search (+1)
Skill: Spot (+1)
Skill: Use Magic Device (+1)


Level 3 (Monk)
Skill: Concentration (+1)
Skill: Disable Device (+1)
Skill: Search (+1)
Skill: Spot (+1)
Feat: (Monk Bonus) Two Weapon Fighting
Feat: (Selected) Weapon Finesse


Level 4 (Monk)
Ability Raise: DEX
Skill: Concentration (+1)
Skill: Disable Device (+1)
Skill: Search (+1)
Skill: Spot (+1)
Feat: (Monk Bonus) Toughness
Enhancement: Rogue Damage Boost I
Enhancement: Rogue Haste Boost I
Enhancement: Drow Melee Attack I
Enhancement: Drow Melee Damage I
Enhancement: Way of the Clever Monkey I
Enhancement: Racial Toughness I
Enhancement: Rogue Sneak Attack Accuracy I
Enhancement: Rogue Sneak Attack Training I
Enhancement: Rogue Hide I
Enhancement: Monk Jump I
Enhancement: Rogue Move Silently I
Enhancement: Monk Tumble I


Level 5 (Monk)
Skill: Concentration (+1)
Skill: Disable Device (+1)
Skill: Search (+1)
Skill: Spot (+1)
Feat: (Monk Path) Path of Inevitable Dominion: Fists of Darkness
Enhancement: Monk Improved Recovery I
Enhancement: Rogue Faster Sneaking I


Level 6 (Monk)
Skill: Concentration (+1)
Skill: Disable Device (+1)
Skill: Search (+1)
Skill: Spot (+1)
Feat: (Selected) Weapon Focus: Piercing Weapons
Enhancement: Racial Toughness II
Enhancement: Monk Jump II
Enhancement: Monk Tumble II


Level 7 (Monk)
Skill: Concentration (+1)
Skill: Disable Device (+1)
Skill: Search (+1)
Skill: Spot (+1)
Enhancement: Static Charge


Level 8 (Monk)
Ability Raise: DEX
Skill: Concentration (+3)
Skill: Disable Device (+1)
Skill: Search (+1)
Feat: (Monk Bonus) Power Attack
Enhancement: Way of the Clever Monkey II
Enhancement: Monk Ninja Spy I


Level 9 (Rogue)
Skill: Disable Device (+1)
Skill: Hide (+1)
Skill: Move Silently (+1)
Skill: Search (+1)
Skill: Spot (+2)
Skill: Use Magic Device (+5)
Feat: (Selected) Improved Two Weapon Fighting
Enhancement: Drow Melee Damage II


Level 10 (Rogue)
Skill: Balance (+1)
Skill: Disable Device (+1)
Skill: Hide (+2)
Skill: Move Silently (+2)
Skill: Search (+1)
Skill: Spot (+1)
Skill: Use Magic Device (+3)
Enhancement: Rogue Damage Boost II
Enhancement: Rogue Haste Boost II


Level 11 (Rogue)
Skill: Balance (+2)
Skill: Hide (+2)
Skill: Move Silently (+2)
Skill: Open Lock (+5)
Enhancement: Rogue Subtle Backstabbing I
Enhancement: Rogue Hide II
Enhancement: Rogue Move Silently II


Level 12 (Rogue)
Ability Raise: DEX
Skill: Disable Device (+2)
Skill: Hide (+2)
Skill: Move Silently (+2)
Skill: Open Lock (+1)
Skill: Search (+2)
Skill: Spot (+2)
Feat: (Selected) Improved Critical: Piercing Weapons
Enhancement: Rogue Assassin I


Level 13 (Rogue)
Skill: Balance (+2)
Skill: Disable Device (+1)
Skill: Hide (+1)
Skill: Move Silently (+1)
Skill: Open Lock (+1)
Skill: Search (+1)
Skill: Spot (+1)
Skill: Use Magic Device (+3)
Enhancement: Rogue Haste Boost III


Level 14 (Monk)
Skill: Balance (+7)
Enhancement: Monk Improved Recovery II


Level 15 (Rogue)
Skill: Disable Device (+2)
Skill: Hide (+1)
Skill: Move Silently (+1)
Skill: Open Lock (+1)
Skill: Search (+2)
Skill: Spot (+2)
Skill: Use Magic Device (+2)
Feat: (Selected) Greater Two Weapon Fighting
Enhancement: Rogue Sneak Attack Accuracy II
Enhancement: Rogue Sneak Attack Training II


Level 16 (Rogue)
Ability Raise: DEX
Skill: Balance (+2)
Skill: Disable Device (+1)
Skill: Hide (+1)
Skill: Jump (+1)
Skill: Move Silently (+1)
Skill: Open Lock (+2)
Skill: Search (+1)
Skill: Spot (+1)
Skill: Use Magic Device (+1)
Enhancement: Rogue Subtle Backstabbing II
Enhancement: Rogue Sneak Attack Training III


Level 17 (Rogue)
Skill: Balance (+1)
Skill: Disable Device (+1)
Skill: Hide (+2)
Skill: Move Silently (+2)
Skill: Open Lock (+2)
Skill: Search (+1)
Skill: Spot (+1)
Skill: Use Magic Device (+1)
Feat: (Rogue Bonus) Improved Evasion
Enhancement: Rogue Sneak Attack Accuracy III


Level 18 (Rogue)
Skill: Balance (+1)
Skill: Disable Device (+1)
Skill: Hide (+2)
Skill: Move Silently (+2)
Skill: Open Lock (+2)
Skill: Search (+1)
Skill: Spot (+1)
Skill: Use Magic Device (+1)
Feat: (Selected) Toughness
Enhancement: Rogue Haste Boost IV


Level 19 (Rogue)
Skill: Balance (+1)
Skill: Disable Device (+1)
Skill: Hide (+2)
Skill: Move Silently (+2)
Skill: Open Lock (+2)
Skill: Search (+1)
Skill: Spot (+1)
Skill: Use Magic Device (+1)
Enhancement: Rogue Subtle Backstabbing III
Enhancement: Rogue Assassin II


Level 20 (Rogue)
Ability Raise: DEX
Skill: Balance (+1)
Skill: Disable Device (+1)
Skill: Hide (+2)
Skill: Move Silently (+2)
Skill: Open Lock (+2)
Skill: Search (+1)
Skill: Spot (+1)
Skill: Use Magic Device (+1)
Feat: (Rogue Bonus) Crippling Strike
Enhancement: Rogue Sneak Attack Training IV

I'd just like to know if you all think it's a workable build. It has all the required trapmonkey skills, and hopefully good DPS and survivability. I'd like to have some more HP, but the person I'm making this for is a drow fanboy and this might replace his Assassin Fighter if he likes it enough.

Anyway, all critiques, reviews, etc., are welcome and appreciated.