I am playing around with a variant of Mythal's Rgr 6/Mnk 8/Ftr 6 Kensai Arcane Archer and was looking for feedback on this build.

The idea is it gains all the AA abilities up through Slayer Arrows, all of the bonus Ranger feats, and Improved Evasion and excellent melee and defensive abilities from Monk 9.

Code:
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Level 20 Lawful Good Elf Male
(9 Monk \ 11 Ranger) 
Hit Points: 282
Spell Points: 345 
BAB: 17\17\22\27\27
Fortitude: 16
Reflex: 20
Will: 13

                  Starting          Feat/Enhancement
Abilities        Base Stats          Modified Stats
(32 Point)       (Level 1)             (Level 20)
Strength             15                    19
Dexterity            16                    25
Constitution         14                    16
Intelligence         10                    12
Wisdom               14                    18
Charisma              8                    10

Tomes Used
+2 Tome of Strength used at level 9
+2 Tome of Dexterity used at level 9
+2 Tome of Constitution used at level 9
+2 Tome of Intelligence used at level 9
+2 Tome of Wisdom used at level 9
+2 Tome of Charisma used at level 9

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

Level 1 (Ranger)
Feat: (Favored Enemy) Favored Enemy: Undead
Feat: (Selected) Point Blank Shot
Enhancement: Elven Ranged Damage I
Enhancement: Ranger Favored Damage I


Level 2 (Ranger)
Enhancement: Aerenal Elf Melee Damage I
Enhancement: Ranger Favored Defense I
Enhancement: Ranger Dexterity I


Level 3 (Monk)
Feat: (Monk Bonus) Dodge
Feat: (Selected) Weapon Focus: Ranged Weapons


Level 4 (Monk)
Feat: (Monk Bonus) Power Attack
Enhancement: Aerenal Elf Melee Attack I
Enhancement: Elven Ranged Attack I
Enhancement: Monk Wisdom I


Level 5 (Ranger)


Level 6 (Ranger)
Feat: (Selected) Mental Toughness


Level 7 (Ranger)
Feat: (Favored Enemy) Favored Enemy: Giant


Level 8 (Ranger)
Enhancement: Ranger Sprint Boost I
Enhancement: Elven Arcane Archer: Imbue Force Arrows
Enhancement: Way of the Clever Monkey I
Enhancement: Ranger Favored Attack I
Enhancement: Ranger Favored Damage II
Enhancement: Elven Arcane Archer I
Enhancement: Ranger Energy of the Wild I
Enhancement: Ranger Dexterity II


Level 9 (Ranger)
Feat: (Selected) Improved Critical: Ranged Weapons


Level 10 (Ranger)
Enhancement: Elven Ranged Damage II
Enhancement: Ranger Item Defense I
Enhancement: Ranger Energy of the Wild II


Level 11 (Ranger)
Enhancement: Elven Ranged Attack II


Level 12 (Ranger)
Feat: (Favored Enemy) Favored Enemy: Lawful Outsider
Feat: (Selected) Toughness


Level 13 (Ranger)
Enhancement: Elven Arcane Archer: Imbue Acid Arrows
Enhancement: Elven Dexterity I
Enhancement: Elven Arcane Archer: Conjure +2 Arrows
Enhancement: Ranger Dexterity III


Level 14 (Monk)
Feat: (Monk Path) Path of Harmonious Balance: Fists of Light
Enhancement: Elven Arcane Archer: Imbue Explosive Arrows
Enhancement: Elven Arcane Archer: Conjure +3 Arrows


Level 15 (Monk)
Feat: (Selected) Improved Critical: Bludgeoning Weapons


Level 16 (Monk)


Level 17 (Monk)
Feat: (Monk Bonus) Deflect Arrows


Level 18 (Monk)
Feat: (Selected) Stunning Blow


Level 19 (Monk)


Level 20 (Monk)
Enhancement: Elven Arcane Archer: Imbue Force Burst Arrows
Enhancement: Elven Arcane Archer: Imbue Slaying Arrows
Enhancement: Elven Arcane Archer: Imbue Terror Arrows
Enhancement: Elven Dexterity II
Enhancement: Way of the Clever Monkey II
Enhancement: Monk Improved Recovery I
Enhancement: Eagle Claw Attack
Enhancement: Adept of Wind
Enhancement: Adept of Flame
Enhancement: Racial Toughness I
Enhancement: Racial Toughness II
Enhancement: Ranger Extra Empathy I
Enhancement: Ranger Favored Resistance I
Enhancement: Elven Arcane Archer: Conjure +4 Arrows
Enhancement: Elven Arcane Archer: Conjure +5 Arrows
Enhancement: Monk Wisdom II