Advice needed for Rgr 12 / Rog 7 / Mnk 1

[Sibellya]

I'm working on a TWF build to mess around with. I've come up with a build based on the classic 'Exploiter' but with 6 Ranger levels substituted for Rogue levels. The final split is Rgr 12 / Rog 7 / Mnk 1 and offers the following benefits:
- Evasion and high Reflex save
- full TWF and ranged combat feat lines
- Tempest II for 100% off-hand attacks
- three Favored Enemies with +9 damage
- Assassin I for 5d6+9 sneak attack damage (with +2 to-hit)
- 20% reduced melee hate
- 25% haste boost, +4 damage boost, +5 skill boost and 40% sprint boost
- Wind Stance and fast Handwrap attack speed for skeleton/construct beating
- Wind Stance and Kama proficiency for fast vorpaling with Dream Edges
- decent AC (about 65-70 with gear)
- decent HP (about 450 with gear)
- no-fail Heal scroll usage through UMD
- trap skills

I'm not aiming to make a super-high AC build but I expect that this will have enough AC to make leveling easier (especially when combined with Evasion and high Reflex save). I don't expect this to be a #1 dps build but I think it should be able to contribute meaningfully.

I've chosen to design this build as a Dwarf simply to make use of cheap D-Axes. The build would probably be better as a Human with Khopeshes but I don't plan on spending lots of plat on gearing this guy.

Without further ado, here it is...

Dwarf
Lawful Good
Ranger 12 / Rogue 7 / Monk 1

PROGRESSION

Rogue 1, Monk 2, Ranger 3-14, Rogue 15-20

STATS

STR: 34 (16 + 5 levels + 2 tome + 2 size + 6 item + 3 exceptional)
DEX: 26 (16 + 2 tome + 2 enhancement + 6 item)
CON: 24 (16 + 2 tome + 6 item)
INT: 10 (8 + 2 tome)
WIS: 22 (14 + 2 tome + 6 item)
CHA: 8 (6 + 2 tome)

SKILLS

UMD, DD, Search, Spot, OL, Balance, Jump, Tumble

FEATS

1: Toughness
2: (Monk Bonus) Dodge
3: Mobility
3: (Favored Enemy) Favored Enemy Undead
6: Spring Attack
7: (Favored Enemy) Favored Enemy Construct
9: Power Attack
12: Improved Critical Slashing
12: (Favored Enemy) Favored Enemy Evil Outsider
15: Optional
18: Optional

Optional feats include: Oversized TWF, Quick Draw, Improved Critical Ranged, Zen Archery

ENHANCEMENTS

Rogue Damage Boost III
Rogue Haste Boost III
Ranger Skill Boost IV
Ranger Sprint Boost II
Dwarven Axe Attack II
Dwarven Axe Damage II
Rogue Subtle Backstabbing II
Racial Toughness II
Ranger Favored Damage III
Ranger Tempest II
Rogue Assassin I
Rogue Sneak Attack Accuracy II
Rogue Sneak Attack Training III
Improved Hide II
Improved Move Silently II
Ranger Dexterity II

Please critique this build. I am especially looking for advice on two more feats to round it out. Ideas I've been considering include Stunning Blow (don't know if the DC would get high enough to be useful) and Quick Draw (to speed up all those action boosts).