Take Stealth instead of Grant Invis, get a lot more damage buff, and possibly more ranged defense (50-55% pre-DR is a decent target). Don't really need Fitness especially with it becoming inherent in I19 (can slap Miracle and Numina uniques in the slots for health), and you might want to pick up Leadership (Tactics specifically, with Assault for more +dam or Maneuvers to hold another -KB IO.
The Panacea proc in Health is a complete waste, you have no acc or damage slotting in Assassin's Strike (3 Nucleolus Hamis and 3 damage procs seems to be fairly standard, or 2 Nucs, the Hecatomb dam/end, and 3 procs), and I'm pretty sure you have nowhere near enough KB protection (you want to shoot for at least 41 points). You'll want to pick up the Leaping pool for CJ, SJ, and Acro. Put a +stealth IO into Super Speed, because with Hide alone (and no pool stealth and stealth IO) you'll be seen by just about everyone which will make your job very difficult.
@macskull, @Not Mac | XBL: macskull | Steam: macskull | Skype: macskull
"One day we all may see each other elsewhere. In Tyria, in Azeroth. We may pass each other and never know it. And that's sad. But if nothing else, we'll still have Rhode Island."
"One day we all may see each other elsewhere. In Tyria, in Azeroth. We may pass each other and never know it. And that's sad. But if nothing else, we'll still have Rhode Island."
ok ill see what i can come up with. thanks for the tips 
ok this is my first attempt at a build so go easy
Villain Plan by Mids' Villain Designer 1.803
http://www.cohplanner.com/
Click this DataLink to open the build!
first attempt at a build: Level 50 Magic Stalker
Primary Power Set: Kinetic Melee
Secondary Power Set: Ninjitsu
Power Pool: Speed
Power Pool: Fitness
Power Pool: Concealment
Power Pool: Leaping
Ancillary Pool: Soul Mastery
Villain Profile:
Level 1: Body Blow -- Hectmb-Dmg(A), Hectmb-Dmg/Rchg(5), Hectmb-Acc/Dmg/Rchg(11), Hectmb-Dmg/EndRdx(13), Hectmb-Acc/Rchg(13), P'ngS'Fest-Stun%(15)
Level 1: Hide -- LkGmblr-Rchg+(A), LkGmblr-Def(3), LkGmblr-Def/EndRdx(42), LkGmblr-Def/Rchg(46)
Level 2: Ninja Reflexes -- LkGmblr-Rchg+(A), LkGmblr-Def(3), LkGmblr-Def/EndRdx(40), LkGmblr-Def/Rchg(46)
Level 4: Danger Sense -- LkGmblr-Rchg+(A), LkGmblr-Def(5), LkGmblr-Def/EndRdx(40), LkGmblr-Def/Rchg(46)
Level 6: Assassin's Strike -- Hectmb-Dam%(A), GS-%Dam(7), Mako-Dam%(7), T'Death-Dam%(9), P'ngS'Fest-Stun%(9), RechRdx-I(11)
Level 8: Build Up -- GSFC-ToHit(A), GSFC-ToHit/Rchg(15), GSFC-ToHit/Rchg/EndRdx(17), GSFC-ToHit/EndRdx(17), GSFC-Rchg/EndRdx(19), GSFC-Build%(19)
Level 10: Hasten -- RechRdx-I(A), RechRdx-I(23)
Level 12: Placate -- RechRdx-I(A), RechRdx-I(45)
Level 14: Super Speed -- Zephyr-Travel(A), Zephyr-Travel/EndRdx(21), Zephyr-ResKB(21)
Level 16: Swift -- Run-I(A)
Level 18: Health -- Numna-Regen/Rcvry+(A), Mrcl-Rcvry+(27), Panac-Heal/+End(34)
Level 20: Stamina -- P'Shift-EndMod(A), P'Shift-End%(23), P'Shift-EndMod/Acc(25), P'Shift-EndMod/Rchg(25)
Level 22: Kuji-In Rin -- RechRdx(A)
Level 24: Kuji-In Sha -- Panac-Heal/EndRedux(A), Panac-EndRdx/Rchg(27), Panac-Heal/Rchg(29), Panac-Heal/EndRedux/Rchg(29), Panac-Heal(31), RechRdx-I(31)
Level 26: Focused Burst -- Apoc-Dmg(A), Apoc-Dmg/Rchg(36), Apoc-Dmg/EndRdx(36), Apoc-Dam%(37), Apoc-Acc/Dmg/Rchg(37), GJ-Dam%(37)
Level 28: Grant Invisibility -- LkGmblr-Rchg+(A), LkGmblr-Def(39), LkGmblr-Def/EndRdx(40)
Level 30: Invisibility -- LkGmblr-Rchg+(A), LkGmblr-Def(31), LkGmblr-Def/EndRdx(39), LkGmblr-Def/Rchg(50)
Level 32: Concentrated Strike -- GS-Acc/Dmg(A), GS-Dam/Rech(33), GS-Dam/End/Rech(33), GS-Acc/End/Rech(33), GS-Acc/Dmg/End/Rech(34), T'Death-Dam%(34)
Level 35: Phase Shift -- RechRdx-I(A), RechRdx-I(36)
Level 38: Kuji-In Retsu -- LkGmblr-Rchg+(A), LkGmblr-Def(39), LkGmblr-Def/EndRdx(43)
Level 41: Dark Blast -- Decim-Acc/Dmg(A), Decim-Dmg/EndRdx(42), Decim-Dmg/Rchg(42), Decim-Acc/Dmg/Rchg(43), Decim-Build%(43)
Level 44: Shadow Meld -- LkGmblr-Rchg+(A), LkGmblr-Def(45), LkGmblr-Def/EndRdx(45)
Level 47: Combat Jumping -- LkGmblr-Rchg+(A), LkGmblr-Def(48), LkGmblr-Def/EndRdx(48), Ksmt-ToHit+(48)
Level 49: Super Jump -- Zephyr-Travel(A), Zephyr-Travel/EndRdx(50), Zephyr-ResKB(50)
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Level 1: Brawl -- Empty(A)
Level 1: Sprint -- Empty(A)
Level 2: Rest -- Empty(A)
Level 1: Assassination
Level 4: Ninja Run
thanks in advance