Arti2/Ranger18, I'd like some feedback

[FrancisP.Fancypants]

I'm really fond of my D.Axe tempest ranger and I'm looking at a ranger life on my main. I wanted something similar with trapskills. This is what I cooked up [edit: switched GTWF for PA, adjusted stats a bit, added the missing +3 tomes]:

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cere5 
Level 20 Neutral Good Dwarf Male
(18 Ranger \ 2 Artificer) 
Hit Points: 358
Spell Points: 516 
BAB: 19\19\24\29\29
Fortitude: 17
Reflex: 15
Will: 10

                  Starting          Feat/Enhancement
Abilities        Base Stats          Modified Stats
(36 Point)       (Level 1)             (Level 20)
Strength             17                    25
Dexterity            14                    19
Constitution         17                    22
Intelligence         15                    18
Wisdom                9                    12
Charisma              6                     9

Tomes Used
+1 Tome of Strength used at level 2
+1 Tome of Dexterity used at level 2
+1 Tome of Constitution used at level 2
+1 Tome of Intelligence used at level 2
+1 Tome of Wisdom used at level 2
+1 Tome of Charisma used at level 2
+2 Tome of Strength used at level 6
+2 Tome of Dexterity used at level 6
+2 Tome of Constitution used at level 6
+2 Tome of Intelligence used at level 6
+2 Tome of Wisdom used at level 6
+2 Tome of Charisma used at level 6
+3 Tome of Strength used at level 10
+3 Tome of Dexterity used at level 10
+3 Tome of Constitution used at level 10
+3 Tome of Intelligence used at level 10
+3 Tome of Wisdom used at level 10
+3 Tome of Charisma used at level 10

                  Starting          Feat/Enhancement
                 Base Skills         Modified Skills
Skills           (Level 1)            (Level 20)
Balance               3                    20.5
Bluff                -2                    -1
Concentration         7                    29
Diplomacy            -2                    -1
Disable Device        6                    30
Haggle               -2                    -1
Heal                 -1                     1
Hide                  2                     4
Intimidate           -2                    -1
Jump                  3                     8
Listen               -1                     1
Move Silently         2                     4
Open Lock             3                    17
Perform              n/a                   n/a
Repair                2                     6
Search                6                    31
Spot                  3                    24
Swim                  3                     7
Tumble                2.5                   4.5
Use Magic Device      2                    24

Level 1 (Artificer)
Feat: (Selected) Dodge
Feat: (Past Life) Past Life: Artificer
Feat: (Past Life) Past Life: Artificer
Feat: (Past Life) Past Life: Rogue
Feat: (Past Life) Past Life: Wizard
Enhancement: Artificer Damage Boost I
Enhancement: Artificer Skill Boost I
Enhancement: Artificer Crossbow Damage I


Level 2 (Artificer)
Enhancement: Artificer Improved Rune Arm Use I


Level 3 (Ranger)
Feat: (Favored Enemy) Favored Enemy: Undead
Feat: (Selected) Mobility
Enhancement: Ranger Sprint Boost I
Enhancement: Dwarven Armored Agility I
Enhancement: Dwarven Axe Damage I
Enhancement: Dwarven Spell Defense I
Enhancement: Ranger Devotion I


Level 4 (Ranger)
Enhancement: Dwarven Axe Attack I
Enhancement: Dwarven Tactics I


Level 5 (Ranger)
Enhancement: Ranger Dexterity I


Level 6 (Ranger)
Feat: (Selected) Spring Attack
Enhancement: Dwarven Armored Agility II
Enhancement: Dwarven Constitution I
Enhancement: Ranger Devotion II
Enhancement: Artificer Wand and Scroll Mastery I


Level 7 (Ranger)
Feat: (Favored Enemy) Favored Enemy: Evil Outsider
Enhancement: Dwarven Axe Damage II


Level 8 (Ranger)
Enhancement: Ranger Tempest I


Level 9 (Ranger)
Feat: (Selected) Toughness
Enhancement: Racial Toughness I
Enhancement: Racial Toughness II
Enhancement: Ranger Energy of the Wild I


Level 10 (Ranger)
Enhancement: Dwarven Axe Attack II


Level 11 (Ranger)
Enhancement: Ranger Devotion III


Level 12 (Ranger)
Feat: (Favored Enemy) Favored Enemy: Construct
Feat: (Selected) Power Attack
Enhancement: Ranger Dexterity II


Level 13 (Ranger)
Enhancement: Dwarven Constitution II


Level 14 (Ranger)
Enhancement: Ranger Tempest II
Enhancement: Ranger Energy of the Wild II


Level 15 (Ranger)
Feat: (Selected) Improved Critical: Slashing Weapons
Enhancement: Ranger Devotion IV


Level 16 (Ranger)
Enhancement: Racial Toughness III


Level 17 (Ranger)
Feat: (Favored Enemy) Favored Enemy: Elf
Enhancement: Dwarven Armor Mastery I
Enhancement: Racial Toughness IV


Level 18 (Ranger)
Feat: (Selected) Two Weapon Defense


Level 19 (Ranger)
Enhancement: Ranger Energy of the Wild III


Level 20 (Ranger)
Enhancement: Dwarven Tactics II
Enhancement: Ranger Favored Damage I
Enhancement: Ranger Favored Resistance I
Enhancement: Ranger Tempest III
Enhancement: Improved Disable Device I

I'm happy with adequate DPS and a lot of flexibility. Repeaters will do fine for a few levels, and then I can switch to D.Axes.

I'll wind up with +3 tomes on STR and INT by the end of this life so that's and extra couple of points, but I'm sure there are some more optimal choices overall. Most of the enchancements I just threw in without too much thought but I'm really wondering about the feats. How necessary is greater TWF and should I go with power attack instead, or something else I haven't considered? Any thoughts on initial stats? How many people can I irritate with an almost nothing Open Locks?

Oh, and to hell with bows unless someone can convince me otherwise.