I know there are a few of these around, already, but I've had a difficult time with Enhancement points. I'm open to criticisms on this build.

Code:
Character Plan by DDO Character Planner Version 3.00
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Level 16 Lawful Good Drow Female
(10 Rogue \ 6 Ranger) 
Hit Points: 198
Spell Points: 25 
BAB: 13\13\18\23
Fortitude: 10
Reflex: 18
Will: 5

                  Starting          Feat/Enhancement
                 Base Stats          Modified Stats
Abilities        (Level 1)             (Level 16)
Strength             15                    19
Dexterity            16                    22
Constitution         12                    14
Intelligence         16                    18
Wisdom                9                    10
Charisma             11                    13

Tomes Used
+2 Tome of Dexterity used at level 1
+2 Tome of Intelligence used at level 1
+1 Tome of Wisdom used at level 1
+2 Tome of Charisma used at level 1
+2 Tome of Constitution used at level 16

                  Starting          Feat/Enhancement
                 Base Skills         Modified Skills
Skills           (Level 1)            (Level 16)
Balance               8                    26
Bluff                 1                     3
Concentration         1                     2
Diplomacy             1                     1
Disable Device        8                    23
Haggle                1                     1
Heal                  0                     0
Hide                  8                    29
Intimidate            1                     1
Jump                  6                    23
Listen                4                    21
Move Silently         8                    29
Open Lock             8                    25
Perform               n/a                   n/a
Repair                4                     4
Search                8                    30
Spot                  4                    21
Swim                  2                     4
Tumble                8                    16
Use Magic Device      5                    20

Level 1 (Rogue)
Feat: (Selected) Toughness


Level 2 (Ranger)
Feat: (Favored Enemy) Favored Enemy: Construct


Level 3 (Ranger)
Feat: (Selected) Dodge


Level 4 (Rogue)


Level 5 (Rogue)


Level 6 (Ranger)
Feat: (Selected) Mobility


Level 7 (Ranger)


Level 8 (Ranger)
Feat: (Favored Enemy) Favored Enemy: Evil Outsider


Level 9 (Ranger)
Feat: (Selected) Spring Attack


Level 10 (Rogue)


Level 11 (Rogue)


Level 12 (Rogue)
Feat: (Selected) Improved Critical: Piercing Weapons


Level 13 (Rogue)


Level 14 (Rogue)


Level 15 (Rogue)
Feat: (Selected) Oversized Two Weapon Fighting


Level 16 (Rogue)
Feat: (Rogue Bonus) Defensive Roll
Enhancement: Rogue Damage Boost I
Enhancement: Rogue Damage Boost II
Enhancement: Rogue Skill Boost I
Enhancement: Rogue Skill Boost II
Enhancement: Rogue Skill Boost III
Enhancement: Rogue Skill Boost IV
Enhancement: Drow Melee Attack I
Enhancement: Drow Melee Attack II
Enhancement: Elven Dexterity I
Enhancement: Elven Dexterity II
Enhancement: Elven Perception I
Enhancement: Elven Perception II
Enhancement: Rogue Subtle Backstabber I
Enhancement: Racial Toughness I
Enhancement: Racial Toughness II
Enhancement: Ranger Favored Defense I
Enhancement: Ranger Tempest I
Enhancement: Rogue Sneak Attack Accuracy I
Enhancement: Rogue Sneak Attack Training I
Enhancement: Rogue Sneak Attack Training II
Enhancement: Way of the Assassin I
Enhancement: Rogue Balance I
Enhancement: Rogue Hide I
Enhancement: Rogue Hide II
Enhancement: Rogue Move Silently I
Enhancement: Rogue Move Silently II
Enhancement: Rogue Search I
Enhancement: Rogue Search II
Enhancement: Rogue Search III
Enhancement: Rogue Dexterity I
Enhancement: Rogue Dexterity II