Str based Quarterstaff Rogue 13/ monk 7

[Tricks74]

This is my first attempt at a build. I decided to try this for the extra attack speed of the 2nd tier monk stance.
I also wanted to be able to heal myself and group members if needed so I took the Dragon marks instead of other feats. So I won't be removing them....
What could I have done to make it better? What did I mess up on, besides the enhancements at lvl 20?

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Lilsplinter 
Level 20 Lawful Good Halfling Male
(7 Monk \ 13 Rogue) 
Hit Points: 241
Spell Points: 0 
BAB: 14\14\19\24
Fortitude: 12
Reflex: 20
Will: 14

                  Starting          Feat/Enhancement
Abilities        Base Stats          Modified Stats
(32 Point)       (Level 1)             (Level 20)
Strength             15                    22
Dexterity            15                    22
Constitution         13                    15
Intelligence         14                    16
Wisdom               11                    14
Charisma              8                    10

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               6                    28
Bluff                -1                     3
Concentration         3                    24
Diplomacy            -1                     1
Disable Device        6                    29
Haggle                0                     2
Heal                  0                     5
Hide                  2                    14
Intimidate           -1                     1
Jump                  6                    25
Listen                0                     5
Move Silently         5                    14
Open Lock             6                    35
Perform              n/a                    n/a
Repair                2                     4
Search                6                    25
Spot                  4                    25
Swim                  2                     7
Tumble                6                    36
Use Magic Device      3                    24

Level 1 (Rogue)
Feat: (Selected) Two Handed Fighting
Enhancement: Rogue Haste Boost I
Enhancement: Rogue Faster Sneaking I
Enhancement: Rogue Balance I
Enhancement: Rogue Improved Trap Sense I


Level 2 (Rogue)
Enhancement: Rogue Sneak Attack Training I
Enhancement: Rogue Tumble I
Enhancement: Rogue Dexterity I


Level 3 (Monk)
Feat: (Monk Bonus) Power Attack
Feat: (Selected) Weapon Focus: Bludgeoning Weapons
Enhancement: Rogue Skill Boost I
Enhancement: Halfling Cunning I
Enhancement: Halfling Guile I
Enhancement: Halfling Luck (Will) I


Level 4 (Monk)
Feat: (Monk Bonus) Toughness
Enhancement: Way of the Patient Tortiose I
Enhancement: Racial Toughness I
Enhancement: Monk Wisdom I


Level 5 (Rogue)
Enhancement: Halfling Dexterity I
Enhancement: Halfling Luck (Will) II


Level 6 (Rogue)
Feat: (Selected) Least Dragonmark of Healing
Enhancement: Rogue Balance II
Enhancement: Rogue Tumble II


Level 7 (Rogue)
Enhancement: Rogue Haste Boost II
Enhancement: Rogue Sneak Attack Training II


Level 8 (Rogue)
Enhancement: Rogue Thief-Acrobat I


Level 9 (Rogue)
Feat: (Selected) Improved Two Handed Fighting
Enhancement: Rogue Dexterity II


Level 10 (Monk)
Feat: (Monk Path) Path of Harmonious Balance: Fists of Light
Enhancement: Rogue Haste Boost III
Enhancement: Extra Dragonmark Use I


Level 11 (Rogue)
Enhancement: Halfling Dexterity II


Level 12 (Rogue)
Feat: (Selected) Improved Critical: Bludgeoning Weapons
Enhancement: Halfling Cunning II
Enhancement: Halfling Guile II


Level 13 (Rogue)
Feat: (Rogue Bonus) Cripling Strike
Enhancement: Rogue Haste Boost IV


Level 14 (Monk)


Level 15 (Monk)
Feat: (Selected) Lesser Dragonmark of Healing
Enhancement: Rogue Dexterity III


Level 16 (Monk)
Feat: (Monk Bonus) Diehard
Enhancement: Adept of Wind
Enhancement: Racial Toughness II
Enhancement: Rogue Faster Sneaking II


Level 17 (Monk)
Enhancement: Rogue Improved Trap Sense II


Level 18 (Rogue)
Feat: (Selected) Greater Dragonmark of Healing
Enhancement: Extra Dragonmark Use II
Enhancement: Extra Dragonmark Use III


Level 19 (Rogue)
Enhancement: Rogue Extra Action Boost I
Enhancement: Halfling Hero's Companion I
Enhancement: Rogue Thief-Acrobat II


Level 20 (Rogue)
Feat: (Rogue Bonus) Skill Mastery
Enhancement: Rogue Skill Boost II
Enhancement: Rogue Subtle Backstabbing I
Enhancement: Rogue Subtle Backstabbing II
Enhancement: Rogue Sneak Attack Training III