Ninja Build: Input/Advice wanted

svajda

I'd like some advice on this build, its intended to do well in pvp, though I imagine it would do ok in pve.

Super Stats:
Level 6: Dexterity (Primary)
Level 10: Intelligence (Secondary)
Level 15: Constitution (Secondary)

Talents:
Level 1:
Level 6:
Level 9:
Level 12:
Level 15:
Level 18:
Level 21:

Powers:
Level 1: Rain of Steel
Level 1: Thunderbolt Lunge (Crippling Challenge, Nailed to the Ground)
Level 6: Form of the Tempest
Level 8: Quarry (Rank 2, Rank 3)
Level 11: Evasive Maneuvers (Sleight of Mind)
Level 14: Ricochet Throw (Rank 2, Rank 3)
Level 17: Masterful Dodge
Level 20: Reaper's Embrace (Rank 2, Rank 3)
Level 23: Vile Lariat (Kyoketsu Shoge)
Level 26: Devour Essence (Rank 2, Phlebotomist)
Level 29: Molecular Self-Assembly
Level 32: Conviction (Rank 2, Rank 3)
Level 35: Bolas
Level 38: Bountiful Chi Resurgence (Resurgent Reiki)

Travel Powers:
Level 6: Acrobatics (Rank 2, Rank 3, Versatility)
Level 35: Lightning Flash (Rank 2)

Specializations:
Dexterity: Gear Utilization (3/3)
Dexterity: Brush It Off (2/2)
Dexterity: Deadly Aim (3/3)
Dexterity: Quick Reflexes (2/3)
Vindicator: Aggressive Stance (2/2)
Vindicator: Merciless (3/3)
Vindicator: Focused Strikes (3/3)
Vindicator: Modified Gear (2/2)
Warden: Fortified Gear (3/3)
Warden: Ruthless (2/2)
Warden: Tenacious (2/2)
Warden: The Best Defense (3/3)
Mastery: Dexterity Mastery (1/1)