So clearly I knew what I was doing and am supremely awesome at making builds and stuff. Thanks for the vote of confidence my fellow fenders 
It is an unusual build in that you didn't slot for damage; however, you already hit 50, go for musculature and kinetics cranks your own damage at this point in the game. You have the IO sets cranking plus the hasten brings back everything as fast as you can handle anyway.
If you twisted my arm, I would suggest putting Celerity +stealth in sprint for more flexibility in your own stealth mode, and a winter's gift slow protection in the superspeed.
Triumphant Defenders Forever
Psylenz FF/Psi, ArticQuark Storm/Rad, Symon BarSisyphus Bots/psn, Max VanSydow Thugs/Dk, Cyclone Symon Bots/stm, Blue Loki Ice/Cd, Widow 46526
HelinCarnate:OMG it is so terrible. I have the option to take 3 more powers but no additional slots. Boo F'ing hoo.
In case you didn't know, kinetics is REALLY good at gimping a single strong enemy target, like AVs. The -damage debuff from siphon power stacks with itself and with the debuff from fulcrum shift. The -recharge debuff from siphon speed stacks with itself and is tagged unresistable. Which I believe makes even a single stack of it work better than most heavy -recharge debuffs on AVs.
Culex's resistance guide
Traveling a path less traveled is fine and all, and I myself have many non-traditional slotted toons... I got to say, I think this one I would have left in Mids to shake my head at months later at some of the dumber choices I had made.
But ok, here we go even if I'm a bit late.
Stamina is slotted too late, then overslotted for someone with Transference. I would advise two max, at around 10th level.
Hasten - its fine with giving 2 starting out, but I would wait till later to give it the third slot so you don't cause yourself unnecessary endurance problems.
Health - two slot it, with a proc and a heal for the set bonus.
Shark Skin - for S/L res, needs to be earlier and slotted some more to hit softcap of 45%.
Dark Blast/Gloom - you really need to slot damage IO here since you're not really getting that much in the debuff (14.77% - 59 pts of damage). With just two Debuff IOs, and four damage you can take Dark Blast from -9%/59 to -11%/87pts with two set bonuses that add 10% to your ACC.
Maneuvers/Tactics - I would say too early, and overslotted but that more a personal opinion.
Assault/Vengeance - I would drop both of those, because FS will likely hit the cap for damage so Assault won't be helping (but not 100% sure of that), and if you got a good enough team then deaths really shouldn't happening that much. Usually on my Dark/Rad fender, its me doing the dying.
Moonbeam - its a pretty good attack for a snipe with Sting of the Manticore slotted in it. My dark/dark corr uses it all the time, even in melee.
Tenebrous Tentacles - I would reslot it, cus right now you are just geting a 40 sec duration on the hold. Since you got the cash, go two Grav Anchors (hold and proc) and then 3 Positron's Blast + its fire proc... that ups its damage to a possible 94 pts with a 34 sec hold (and chance to stack).
Hover - overslotted for minimal gain.
Nightfall - switch to damage IOs for the same reason as with Gloom.
Transference - way, way overslotted! On mine, I think I have two crafted acc and end... more then enough. Heck, you could 'frank-slot' with three acc/end from the varies sets.
Burnout - more recharge, but you may consider just dropping it. Not really seeing the game changing move that this toon can do that would turn a battle around. Almost all of your powers are pretty fast, outside of Blackstar...so unless you want to do two 'booms!' real quick, I might reconsider.
Blackstar - unless you got purples to burn and no place better for them, I might just go for the cheaper Obliteration set.
Torrent - Yes, knockback... but you got two holds, and the Force Feedback set is pretty nice when you add in the proc for the chance for recharge.
/Empaths can turn three people into Jesus, one person into God, and everyone else into the twelve apostles.~Angry_Citizen
Don't you know that discussion of power selection/slotting can ONLY be based on hearsay, rumor, idle speculation, and bald-faced lies??!? ~Elf_Sniper
So I just got my Kinetics/Dark Defender to lvl 50 and now I'm looking at an end game build for him. This is more of a long time project/what should I do with him. I know fish mastery is pretty blase' but I really like having another cone immobilize and there is something supremely satisfying about seeing a giant shark swallowing some poor fool whole. I built for recharge to ensure maximum FSing all the time and with 2 Siphons hasten is perma so I pikced Musclature to help shore up my damage a bit since my attacks were pretty focused on the -to hit. He plays well as a hover blaster (except in caves, but thems the breaks) but any advice from more experienced defenders (this is my only defender and only my 5th 50) is very appreciated. Thanks.
Villain Plan by Mids' Villain Designer 1.952
http://www.cohplanner.com/
Click this DataLink to open the build!
Kindarken: Level 50 Magic Defender
Primary Power Set: Kinetics
Secondary Power Set: Dark Blast
Power Pool: Speed
Power Pool: Leadership
Power Pool: Flight
Ancillary Pool: Leviathan Mastery
Villain Profile:
Level 1: Transfusion -- Nictus-Acc/EndRdx/Rchg(A), Nictus-Acc/EndRdx/Heal/HP/Regen(3), Nictus-Heal/HP/Regen/Rchg(11), Nictus-Acc/Heal(13), Nictus-Heal(19)
Level 1: Dark Blast -- SipInsght-ToHitDeb(A), SipInsght-Acc/ToHitDeb(3), SipInsght-Acc/Rchg(5), SipInsght-ToHitDeb/EndRdx/Rchg(13), SipInsght-Acc/EndRdx/Rchg(21), SipInsght-%ToHit(43)
Level 2: Siphon Power -- RechRdx-I(A), EndRdx-I(5), Acc-I(34)
Level 4: Gloom -- DarkWD-Slow%(A), DarkWD-ToHitdeb/Rchg/EndRdx(23), DarkWD-Rchg/EndRdx(31), DarkWD-ToHitDeb/EndRdx(37), HO:Nucle(40)
Level 6: Siphon Speed -- TmpRdns-Acc/Slow(A), TmpRdns-EndRdx/Rchg/Slow(7), TmpRdns-Acc/Dmg/Slow(7), TmpRdns-Acc/EndRdx(15), TmpRdns-Rng/Slow(23)
Level 8: Hasten -- RechRdx-I(A), RechRdx-I(9), RechRdx-I(9)
Level 10: Maneuvers -- LkGmblr-Rchg+(A), LkGmblr-Def/EndRdx(11), LkGmblr-Def(25), LkGmblr-Def/EndRdx/Rchg(34)
Level 12: Speed Boost -- Winter-ResSlow(A)
Level 14: Tactics -- AdjTgt-ToHit/EndRdx(A), AdjTgt-ToHit/Rchg(15), AdjTgt-EndRdx/Rchg(25), AdjTgt-ToHit/EndRdx/Rchg(46), AdjTgt-ToHit(46)
Level 16: Tenebrous Tentacles -- Enf'dOp-Acc/Rchg(A), Enf'dOp-EndRdx/Immob(17), Enf'dOp-Acc/EndRdx(17), Enf'dOp-Immob/Rng(19), Enf'dOp-Acc/Immob/Rchg(29), Enf'dOp-Acc/Immob(34)
Level 18: Vengeance -- LkGmblr-Rchg+(A), AdjTgt-Rchg(40)
Level 20: Assault -- EndRdx-I(A), EndRdx-I(21)
Level 22: Night Fall -- DarkWD-Rchg/EndRdx(A), DarkWD-ToHitdeb/Rchg/EndRdx(43), DarkWD-ToHitDeb/EndRdx(45), DarkWD-Slow%(45), HO:Nucle(46)
Level 24: Hover -- LkGmblr-Rchg+(A), LkGmblr-Def/EndRdx(31), LkGmblr-Def(36), LkGmblr-Def/EndRdx/Rchg(37)
Level 26: Transference -- Efficacy-EndMod/EndRdx(A), Efficacy-EndMod/Rchg(27), Efficacy-EndMod/Acc/Rchg(27), Efficacy-Acc/Rchg(29), Efficacy-EndMod(31), Efficacy-EndMod/Acc(33)
Level 28: Super Speed -- Clrty-Stlth(A)
Level 30: Increase Density -- S'fstPrt-ResDam/Def+(A), S'fstPrt-ResKB(45)
Level 32: Fulcrum Shift -- RechRdx-I(A), EndRdx-I(33), Acc-I(33)
Level 35: School of Sharks -- GravAnch-Immob/Rchg(A), GravAnch-Acc/Immob/Rchg(36), GravAnch-Acc/Rchg(36), GravAnch-Immob/EndRdx(37), GravAnch-Hold%(43)
Level 38: Life Drain -- Thundr-Acc/Dmg/EndRdx(A), Thundr-Dmg/EndRdx/Rchg(39), Thundr-Acc/Dmg/Rchg(39), Thundr-Acc/Dmg(39)
Level 41: Spirit Shark Jaws -- BasGaze-Acc/Rchg(A), BasGaze-EndRdx/Rchg/Hold(42), BasGaze-Acc/Hold(42), BasGaze-Rchg/Hold(42)
Level 44: Burnout -- RechRdx-I(A)
Level 47: Blackstar -- Armgdn-Dam%(A), Armgdn-Dmg(48), Armgdn-Acc/Dmg/Rchg(48), Armgdn-Dmg/Rchg(48), Armgdn-Acc/Rchg(50)
Level 49: Shark Skin -- HO:Ribo(A)
Level 50: Cryonic Radial Final Judgement
Level 50: Rularuu Core Superior Ally
Level 50: Musculature Radial Paragon
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Level 1: Brawl -- Empty(A)
Level 1: Sprint -- Empty(A)
Level 1: Vigilance
Level 2: Rest -- Empty(A)
Level 2: Swift -- Flight-I(A)
Level 2: Health -- Mrcl-Rcvry+(A)
Level 2: Hurdle -- Jump-I(A)
Level 2: Stamina -- P'Shift-End%(A), P'Shift-EndMod/Acc(40), P'Shift-EndMod(50), P'Shift-EndMod/Rchg(50)
Level 4: Ninja Run