Another help request: MA/Regen this time

Speed, Fitness, and Fighting are all a definite must. Speed because Hasten is awesome and SS is a great way to get in another BotZ 3 piece. Fitness because you're most likely not going to be endurance sustainable without it. Fighting because extra mitigation is wonderful. From there, I'd choose either Leaping or Flight. Air Superiority isn't really all that great imo, especially when you're talking about an IO build where the only fights that are going to give you trouble are going to be those that Air Superiority doesn't really help. Hover/CJ and Flight/SJ are pretty much modular exchanges and, if you don't think Hover is fast enough, you'd be surprised. With BotZ 3 piece, Swift, and a couple +move set bonuses, it'll actually get you around pretty fast.

As to your choice of APPs, Weapon Mastery is less than optimal. Caltrops is a rather poor choice where mitigation is concerned (at least in my experience) and Shuriken is simply atrocious. If you're taking them, you're doing so against the better judgment of most of the people on these forums, especially if you want to fit in all of the other powers that will make you effective.

Easily, especially if you also drop Eagle's Claw. Storm>Crane>Storm>CAK is the best ST damage chain MA can manage. The only problem is that it requires a boatload of +rech to get. Luckily, you're regen so it's not like huge amounts of +rech weren't in your future anyway.

Kinetic Combat procs are cute. Not particularly effective, but cute. The biggest problem is that they prevent you from getting those sweet 6 piece Mako's and Touch of Death set bonuses.

+Rech first. Then +def, positional before typed, melee before ranged before AoE. +Regen only if there's nothing else to get. +HP should only be considered as a tangential benefit seeing as you should be just a few points shy of capped with Dull Pain and the +hp accolades anyway. You'll be getting what little +hp you need from stuff like the Mako's Bites and Touch of Deaths.

Sets to remember: Doctored Wounds 5 piece, Touch of Death 6 piece, Mako's Bite 6 piece, Obliteration 6 piece, Gaussian's 6 piece, Blessing of the Zephyr 2 or 3 piece (3 is better but 2 is fine since AoE is rare-ish). The LotG +rech IOs are Steadfast Protection 3% +def IO (and the Gladiator's version) both all important to remember, along with the heal set uniques.

Here's the MA/Regen build I've got saved. It fulfills most of your requirements except that it doesn't have Eagles Claw (interesting visual does not counteract bad power) and doesn't have Weapon Mastery. If I had a bit more time (gotta be heading to work soon), I could mess with it a bit and fit Weapon Mastery in and keep the screwing everything else up to a minimum. Even if you don't use it, there is a lot of really good slotting in there and you can steal/borrow for your own build, especially where attack strings and endurance sustainability are concerned.

Hero Plan by Mids' Hero Designer 1.401
http://www.cohplanner.com/

Click this DataLink to open the build!

Level 50 Mutation Scrapper
Primary Power Set: Martial Arts
Secondary Power Set: Regeneration
Power Pool: Leaping
Power Pool: Fighting
Power Pool: Speed
Power Pool: Fitness
Ancillary Pool: Body Mastery

Hero Profile:
Level 1: Storm Kick -- Hectmb-Dmg/Rchg(A), Hectmb-Acc/Dmg/Rchg(3), Hectmb-Acc/Rchg(3), Hectmb-Dmg/EndRdx(5), Hectmb-Dam%(5), Mako-Acc/EndRdx/Rchg(46)
Level 1: Fast Healing -- Numna-Regen/Rcvry+(A), Mrcl-Rcvry+(29)
Level 2: Reconstruction -- Dct'dW-EndRdx/Rchg(A), Dct'dW-Heal/Rchg(7), Dct'dW-Heal/EndRdx/Rchg(7), Dct'dW-Heal(9), Dct'dW-Rchg(9)
Level 4: Quick Recovery -- P'Shift-End%(A), P'Shift-EndMod(11), EndMod-I(11)
Level 6: Focus Chi -- AdjTgt-Rchg(A), AdjTgt-ToHit/Rchg(13), RechRdx-I(36)
Level 8: Crane Kick -- T'Death-Acc/Dmg(A), T'Death-Dmg/EndRdx(13), T'Death-Dmg/Rchg(15), T'Death-Acc/Dmg/EndRdx(15), T'Death-Dmg/EndRdx/Rchg(17), T'Death-Dam%(17)
Level 10: Dull Pain -- Dct'dW-EndRdx/Rchg(A), Dct'dW-Heal/Rchg(19), Dct'dW-Heal/EndRdx/Rchg(19), Dct'dW-Heal(21), Dct'dW-Rchg(21)
Level 12: Combat Jumping -- LkGmblr-Rchg+(A), LkGmblr-Def(23), Zephyr-Travel(23), Zephyr-Travel/EndRdx(25), Zephyr-ResKB(25)
Level 14: Super Jump -- Zephyr-Travel(A), Zephyr-Travel/EndRdx(27), Zephyr-ResKB(27)
Level 16: Integration -- Numna-Heal/EndRdx(A), Numna-Heal(29), Numna-Heal/Rchg(31)
Level 18: Crippling Axe Kick -- T'Death-Acc/Dmg(A), T'Death-Dmg/EndRdx(31), T'Death-Dmg/Rchg(31), T'Death-Acc/Dmg/EndRdx(33), T'Death-Dmg/EndRdx/Rchg(33), T'Death-Dam%(33)
Level 20: Boxing -- Amaze-Stun/Rchg(A), Amaze-Acc/Stun/Rchg(48), Amaze-Acc/Rchg(48), Amaze-EndRdx/Stun(50), Amaze-ToHitDeb%(50)
Level 22: Tough -- ImpArm-ResDam(A), ImpArm-ResDam/EndRdx(34), ImpArm-ResDam/EndRdx/Rchg(34), ImpArm-ResDam/Rchg(34)
Level 24: Weave -- LkGmblr-Rchg+(A), LkGmblr-Def(36), LkGmblr-Def/EndRdx(36)
Level 26: Dragon's Tail -- Oblit-Dmg(A), Oblit-Acc/Rchg(37), Oblit-Dmg/Rchg(37), Oblit-Acc/Dmg/Rchg(39), Oblit-Acc/Dmg/EndRdx/Rchg(39), Oblit-%Dam(39)
Level 28: Instant Healing -- Dct'dW-Heal(A), Dct'dW-EndRdx/Rchg(40), Dct'dW-Heal/Rchg(40), Dct'dW-Heal/EndRdx/Rchg(40), Dct'dW-Rchg(42)
Level 30: Hasten -- RechRdx-I(A), RechRdx-I(37), RechRdx-I(42)
Level 32: Hurdle -- Jump-I(A)
Level 35: Health -- RgnTis-Regen+(A)
Level 38: Moment of Glory -- LkGmblr-Rchg+(A), LkGmblr-Def/Rchg(43), RechRdx-I(43), RechRdx-I(43)
Level 41: Focused Accuracy -- GSFC-ToHit(A), GSFC-Build%(42), GSFC-ToHit/Rchg(45), GSFC-ToHit/Rchg/EndRdx(45), GSFC-Rchg/EndRdx(45), GSFC-ToHit/EndRdx(46)
Level 44: Stamina -- P'Shift-End%(A), P'Shift-EndMod(46)
Level 47: Super Speed -- Zephyr-Travel(A), Zephyr-Travel/EndRdx(48), Zephyr-ResKB(50)
Level 49: Resilience -- S'fstPrt-ResDam/Def+(A)
------------
Level 1: Brawl -- Empty(A)
Level 1: Sprint -- Empty(A)
Level 2: Rest -- Empty(A)
Level 1: Critical Hit

Armageddon for the +rech. Tweaking it a bit now, this is probably how I'd do it. Since you're going to be using Caltrops more than Boxing (gotta love them set mules, huh?), you can get rid of Absolute Amazement to get some slotting in power that at least stands a chance of being used. You can then divvy out the extra slots to get some more recovery and regeneration. Considering that you'd be running a roughly 4 end/sec endurance surplus, I'm not even sure you can run out of endurance.

Hero Plan by Mids' Hero Designer 1.401
http://www.cohplanner.com/

Click this DataLink to open the build!

Level 50 Mutation Scrapper
Primary Power Set: Martial Arts
Secondary Power Set: Regeneration
Power Pool: Leaping
Power Pool: Fighting
Power Pool: Speed
Power Pool: Fitness
Ancillary Pool: Weapon Mastery

Hero Profile:
Level 1: Storm Kick -- Hectmb-Dmg/Rchg(A), Hectmb-Acc/Dmg/Rchg(3), Hectmb-Acc/Rchg(3), Hectmb-Dmg/EndRdx(5), Hectmb-Dam%(5), Mako-Acc/EndRdx/Rchg(46)
Level 1: Fast Healing -- Numna-Regen/Rcvry+(A), Mrcl-Rcvry+(29), Numna-Heal(46)
Level 2: Reconstruction -- Dct'dW-EndRdx/Rchg(A), Dct'dW-Heal/Rchg(7), Dct'dW-Heal/EndRdx/Rchg(7), Dct'dW-Heal(9), Dct'dW-Rchg(9)
Level 4: Quick Recovery -- P'Shift-End%(A), P'Shift-EndMod(11), EndMod-I(11)
Level 6: Focus Chi -- AdjTgt-ToHit/Rchg(A), AdjTgt-Rchg(13), RechRdx-I(36)
Level 8: Crane Kick -- T'Death-Acc/Dmg(A), T'Death-Dmg/EndRdx(13), T'Death-Dmg/Rchg(15), T'Death-Acc/Dmg/EndRdx(15), T'Death-Dmg/EndRdx/Rchg(17), T'Death-Dam%(17)
Level 10: Dull Pain -- Dct'dW-EndRdx/Rchg(A), Dct'dW-Heal/Rchg(19), Dct'dW-Heal/EndRdx/Rchg(19), Dct'dW-Heal(21), Dct'dW-Rchg(21)
Level 12: Combat Jumping -- LkGmblr-Rchg+(A), LkGmblr-Def(23), Zephyr-Travel(23), Zephyr-Travel/EndRdx(25), Zephyr-ResKB(25)
Level 14: Super Jump -- Zephyr-Travel(A), Zephyr-Travel/EndRdx(27), Zephyr-ResKB(27)
Level 16: Integration -- Numna-Heal/EndRdx(A), Numna-Heal(29), Numna-Heal/Rchg(31)
Level 18: Crippling Axe Kick -- T'Death-Acc/Dmg(A), T'Death-Dmg/EndRdx(31), T'Death-Dmg/Rchg(31), T'Death-Acc/Dmg/EndRdx(33), T'Death-Dmg/EndRdx/Rchg(33), T'Death-Dam%(33)
Level 20: Boxing -- Empty(A)
Level 22: Tough -- ImpArm-ResDam(A), ImpArm-ResDam/EndRdx(34), ImpArm-ResDam/EndRdx/Rchg(34), ImpArm-ResDam/Rchg(34)
Level 24: Weave -- LkGmblr-Rchg+(A), LkGmblr-Def(36), LkGmblr-Def/EndRdx(36), LkGmblr-Def/EndRdx/Rchg(50)
Level 26: Dragon's Tail -- Oblit-Dmg(A), Oblit-Acc/Rchg(37), Oblit-Dmg/Rchg(37), Oblit-Acc/Dmg/Rchg(39), Oblit-Acc/Dmg/EndRdx/Rchg(39), Oblit-%Dam(39)
Level 28: Instant Healing -- Dct'dW-Heal(A), Dct'dW-EndRdx/Rchg(40), Dct'dW-Heal/Rchg(40), Dct'dW-Heal/EndRdx/Rchg(40), Dct'dW-Rchg(42)
Level 30: Hasten -- RechRdx-I(A), RechRdx-I(37), RechRdx-I(42)
Level 32: Hurdle -- Jump-I(A)
Level 35: Health -- RgnTis-Regen+(A)
Level 38: Moment of Glory -- LkGmblr-Rchg+(A), LkGmblr-Def/Rchg(43), RechRdx-I(43), RechRdx-I(43)
Level 41: Caltrops -- Ragnrk-Dmg(A), Ragnrk-Dmg/Rchg(42), Ragnrk-Acc/Dmg/Rchg(45), Ragnrk-Acc/Rchg(45), Ragnrk-Dmg/EndRdx(45)
Level 44: Stamina -- P'Shift-End%(A), P'Shift-EndMod(46), EndMod-I(50)
Level 47: Shuriken -- Apoc-Dmg/Rchg(A), Apoc-Acc/Dmg/Rchg(48), Apoc-Acc/Rchg(48), Apoc-Dmg/EndRdx(48), Apoc-Dam%(50)
Level 49: Resilience -- S'fstPrt-ResDam/Def+(A)
------------
Level 1: Brawl -- Empty(A)
Level 1: Sprint -- Empty(A)
Level 2: Rest -- Empty(A)
Level 1: Critical Hit

They ALL float down here. When you're down here with us, you'll float too!

@Starflier