An SO-based PvE DM/EA stalker build - feedback requested

I'm hoping the build below will offer good spike DPS, survive well when scrapping, and have few problems with endurance management. He's a PvE stalker meant to be self sufficient when on teams and good at soloing.

Is the build below likely to achieve these stated goals?

The one perhaps apparently odd choice is to put in maneuvers, toward the end; but, adding maneuvers gets this stalker very close to the softcap for defense, even when scrapping (ie: not hidden).

IOs are not in the picture, and with that constrain in mind feedback about how this could be better would be helpful, and appreciated.

Villain Plan by Mids' Villain Designer 1.96
http://www.cohplanner.com/

Click this DataLink to open the build!

Sage of Shadows: Level 50 Magic Stalker
Primary Power Set: Dark Melee
Secondary Power Set: Energy Aura
Power Pool: Flight
Power Pool: Teleportation
Power Pool: Fighting
Power Pool: Leadership
Ancillary Pool: Body Mastery

Villain Profile:
Level 1: Shadow Punch -- Acc(A), Dmg(17), Dmg(17), Dmg(40), EndRdx(42), RechRdx(43)
Level 1: Hide -- DefBuff(A), DefBuff(27), DefBuff(33)
Level 2: Smite -- Acc(A), Dmg(3), Dmg(3), Dmg(5), EndRdx(5), RechRdx(11)
Level 4: Kinetic Shield -- EndRdx(A), DefBuff(23), DefBuff(25), DefBuff(33)
Level 6: Assassin's Eclipse -- Acc(A), Acc(7), Dmg(7), Dmg(9), Dmg(9), RechRdx(11)
Level 8: Hover -- Flight(A), Flight(15)
Level 10: Entropy Shield -- EndRdx(A)
Level 12: Placate -- RechRdx(A), RechRdx(13), RechRdx(13)
Level 14: Teleport -- EndRdx(A)
Level 16: Build Up -- RechRdx(A), RechRdx(34), RechRdx(39)
Level 18: Siphon Life -- Acc(A), Acc(19), Dmg(19), Dmg(21), EndRdx(21), RechRdx(23)
Level 20: Power Shield -- EndRdx(A), DefBuff(25), DefBuff(27), DefBuff(33)
Level 22: Kinetic Dampening -- ResDam(A), ResDam(40), ResDam(40)
Level 24: Boxing -- Acc(A)
Level 26: Touch of Fear -- Acc(A), Acc(50)
Level 28: Energy Drain -- RechRdx(A), RechRdx(29), DefBuff(29), DefBuff(31), EndMod(31), EndMod(31)
Level 30: Tough -- EndRdx(A), ResDam(43), ResDam(43), ResDam(45)
Level 32: Weave -- EndRdx(A), DefBuff(34), DefBuff(34), DefBuff(37)
Level 35: Energize -- RechRdx(A), RechRdx(36), RechRdx(36), Heal(36), Heal(37), Heal(37)
Level 38: Overload -- RechRdx(A), RechRdx(39), Heal(39), Heal(50), Heal(50)
Level 41: Superior Conditioning -- EndMod(A), EndMod(42), EndMod(42)
Level 44: Shadow Maul -- Acc(A), Acc(45), Dmg(45), Dmg(46), EndRdx(46), RechRdx(46)
Level 47: Maneuvers -- EndRdx(A), DefBuff(48), DefBuff(48), DefBuff(48)
Level 49: Physical Perfection -- EndMod(A)
Level 1: Assassination
Level 1: Brawl -- Acc(A)
Level 1: Prestige Power Dash -- Empty(A)
Level 1: Prestige Power Slide -- Empty(A)
Level 1: Prestige Power Quick -- Empty(A)
Level 1: Prestige Power Rush -- Empty(A)
Level 1: Prestige Power Surge -- Empty(A)
Level 1: Sprint -- Empty(A)
Level 2: Rest -- Heal(A)
Level 4: Ninja Run
Level 2: Swift -- Flight(A)
Level 2: Health -- Heal(A)
Level 2: Hurdle -- Jump(A)
Level 2: Stamina -- EndMod(A), EndMod(15)
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Over 60 reads and no feedback?

My thinking is that this planned build can be improved in some way -- especially since I've not played stalkers late into the game (ie: all level 30 or less, so far).

Any help provided would be appreciated. Thank you in advance.