One thing I've experienced with is Team Teleport. You can actually teleport FFG with you and since your pets are melee oriented, you can try to team tp into the mob to start the fight. I've tried it on my Necro/Trap.
What's left is to normalize all Assassin Strikes and improve Stalker's old sets (Claw, MA and EM)! You don't need to bring back the missing PbAoE attack. You just need to make the existing ones better! For example, make Slice a WIDER and LONGER cone.
I think with this build it is better to grab all the agro before sending in the ninja's, thus team teleport is not really needed. Besides, you can't use it in a party because it will piss people off.
Maybe this build is too defensive and I'm better off getting more recharge or something. Still it's fun when nothing can hurt you. 
Been playing on and off ever since beta and just resubbed. Waiting for my client to update I'm just making some fun builds.
Highlight's of this build:
softcap ranged and AOE defence
66.4 S/L resists
Lots of regen with Triage Beacon and Aid Self for over the top healing.
Point is to tank for your pets with provoke. Even if your pets die and you loose bodyguard you have more then enough defense to just stand there and resummon.
I'm sure this build is not optimal, it's more a proof of concept. Let me know what you think.
Villain Plan by Mids' Villain Designer 1,81
http://www.cohplanner.com/
Click this DataLink to open the build!
Level 50 Magic Mastermind
Primary Power Set: Ninjas
Secondary Power Set: Traps
Power Pool: Fighting
Power Pool: Medicine
Power Pool: Presence
Power Pool: Speed
Ancillary Pool: Field Mastery
Villain Profile:
Level 1: Call Genin -- SvgnRt-PetResDam(A), BldM'dt-Dmg(3), BldM'dt-Acc/Dmg(3), BldM'dt-Dmg/EndRdx(5), BldM'dt-Acc(5), BldM'dt-Acc/Dmg/EndRdx(39)
Level 1: Web Grenade -- TotHntr-Immob/Acc(A), TotHntr-Acc/EndRdx(7), TotHntr-EndRdx/Immob(7), TotHntr-Acc/Rchg(9), TotHntr-Dam%(9), TotHntr-Acc/Immob/Rchg(11)
Level 2: Caltrops -- P'ngTtl-Dmg/Slow(A), P'ngTtl-Acc/EndRdx(19), P'ngTtl-Acc/Slow(33), P'ngTtl-Rng/Slow(34), P'ngTtl--Rchg%(48), P'ngTtl-EndRdx/Rchg/Slow(48)
Level 4: Triage Beacon -- Dct'dW-Heal(A), Dct'dW-Heal/EndRdx(11), Dct'dW-Rchg(13), Dct'dW-Heal/Rchg(13), Dct'dW-EndRdx/Rchg(19)
Level 6: Train Ninjas -- EndRdx-I(A)
Level 8: Boxing -- Acc-I(A)
Level 10: Acid Mortar -- AnWeak-Acc/Rchg(A), ShldBrk-Acc/Rchg(43), Achilles-DefDeb/Rchg(43), Achilles-ResDeb%(45), Achilles-DefDeb(46)
Level 12: Call Jounin -- BldM'dt-Acc(A), BldM'dt-Acc/Dmg(40), BldM'dt-Dmg(42), BldM'dt-Acc/Dmg/EndRdx(42), BldM'dt-Dmg/EndRdx(42), BldM'dt-Acc/EndRdx(48)
Level 14: Tough -- S'fstPrt-ResDam/Def+(A), S'fstPrt-ResDam/EndRdx(15), Aegis-ResDam/EndRdx(15)
Level 16: Force Field Generator -- LkGmblr-Rchg+(A), LkGmblr-Def(17), LkGmblr-Def/EndRdx(17), LkGmblr-Def/EndRdx/Rchg(37)
Level 18: Smoke Flash -- EndRdx-I(A)
Level 20: Poison Trap -- Lock-Acc/Hold(A), Lock-Acc/Rchg(21), Lock-Rchg/Hold(21), Lock-EndRdx/Rchg/Hold(27), Lock-Acc/EndRdx/Rchg/Hold(27), Lock-%Hold(29)
Level 22: Weave -- LkGmblr-Rchg+(A), RedFtn-Def/EndRdx(23), RedFtn-EndRdx(23), RedFtn-Def(25), RedFtn-Def/EndRdx/Rchg(25)
Level 24: Aid Other -- Heal-I(A)
Level 26: Oni -- EdctM'r-PetDef(A), BldM'dt-Dmg/EndRdx(39), BldM'dt-Acc(40), BldM'dt-Dmg(40), BldM'dt-Acc/Dmg(43), BldM'dt-Acc/Dmg/EndRdx(50)
Level 28: Seeker Drones -- Stpfy-Acc/Rchg(A), Stpfy-EndRdx/Stun(29), Stpfy-KB%(34), Stpfy-Acc/EndRdx(34), Stpfy-Stun/Rng(46), Stpfy-Acc/Stun/Rchg(46)
Level 30: Aid Self -- Numna-Heal/EndRdx(A), Numna-EndRdx/Rchg(31), Numna-Heal(31), Numna-Regen/Rcvry+(31), Numna-Heal/Rchg(33), Numna-Heal/EndRdx/Rchg(33)
Level 32: Kuji In Zen -- EndRdx-I(A)
Level 35: Provoke -- Mocking-Taunt(A), Mocking-Taunt/Rchg(36), Mocking-Taunt/Rchg/Rng(36), Mocking-Acc/Rchg(36), Mocking-Taunt/Rng(37), Mocking-Rchg(37)
Level 38: Hasten -- RechRdx-I(A), RechRdx-I(39)
Level 41: Resuscitate -- RgnTis-Regen+(A)
Level 44: Temp Invulnerability -- ImpArm-ResDam/EndRdx(A), ImpArm-ResDam(45), RctvArm-ResDam/EndRdx(45)
Level 47: Super Speed -- Clrty-Stlth(A)
Level 49: Fistful of Arrows -- Acc-I(A)
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Level 1: Brawl -- Empty(A)
Level 1: Sprint -- Empty(A)
Level 2: Rest -- Empty(A)
Level 1: Supremacy
Level 4: Ninja Run