Rhapsody of Sword (Broad Sword/Invulnerability build)

While I know there's not very many of this build around, I thought I'd take a chance and see if I could get a let little bit of help. This one has changed in a number of ways, and I'm not sure of good way to do this yet. So...I ask for second opinions, etc, etc.

Thank you kindly.

Hero Plan by Mids' Hero Designer 1.601
http://www.cohplanner.com/

Click this DataLink to open the build!

Lazaro Rose: Level 50 Magic Scrapper
Primary Power Set: Broad Sword
Secondary Power Set: Invulnerability
Power Pool: Leaping
Power Pool: Fitness
Power Pool: Fighting
Ancillary Pool: Body Mastery

Hero Profile:
Level 1: Hack -- C'ngImp-Acc/Dmg/EndRdx:50(A), C'ngImp-Acc/Dmg:50(3), C'ngImp-Dmg/EndRdx:50(3), C'ngImp-Dmg/Rchg:50(5), C'ngImp-Acc/Dmg/Rchg:50(5)
Level 1: Resist Physical Damage -- S'fstPrt-ResDam/Def+:30(A), ImpArm-ResPsi:40(7), ImpArm-ResDam:40(34)
Level 2: Temp Invulnerability -- Aegis-ResDam/EndRdx:50(A), Aegis-ResDam/EndRdx/Rchg:50(21), Aegis-ResDam:50(23)
Level 4: Slice -- Oblit-Acc/Dmg/EndRdx/Rchg:50(A), Oblit-Dmg:50(17), Oblit-Acc/Rchg:50(17), Oblit-Dmg/Rchg:50(19), Oblit-Acc/Dmg/Rchg:50(19)
Level 6: Dull Pain -- Dct'dW-Heal:50(A), Dct'dW-EndRdx/Rchg:50(7), Dct'dW-Heal/EndRdx:50(9), Dct'dW-Heal/Rchg:50(13), Dct'dW-Heal/EndRdx/Rchg:50(15)
Level 8: Build Up -- Rec'dRet-ToHit:20(A), Rec'dRet-ToHit/Rchg:20(9), RechRdx-I:50(15), RechRdx-I:50(46)
Level 10: Combat Jumping -- Ksmt-ToHit+:30(A), LkGmblr-Rchg+:50(11), Zephyr-Travel:50(11), Zephyr-Travel/EndRdx:50(13)
Level 12: Hurdle -- Jump-I:50(A)
Level 14: Super Jump -- HO:Micro(A)
Level 16: Unyielding -- Aegis-ResDam/EndRdx:50(A), Aegis-EndRdx/Rchg:50(21), Aegis-ResDam/Rchg:50(23), Aegis-ResDam/EndRdx/Rchg:50(25), Aegis-Psi/Status:40(25), Aegis-ResDam:50(34)
Level 18: Whirling Sword -- Sciroc-Dam%:20(A), Sciroc-Acc/Dmg/EndRdx:50(27), Sciroc-Acc/Dmg:50(27), Sciroc-Dmg/EndRdx:50(29), Sciroc-Dmg/Rchg:50(29)
Level 20: Health -- Numna-Regen/Rcvry+:50(A), Mrcl-Rcvry+:40(31), Heal-I:50(31)
Level 22: Stamina -- P'Shift-End%:50(A), P'Shift-EndMod:50(31), EndMod-I:50(33)
Level 24: Kick -- KntkC'bat-Acc/Dmg:35(A), KntkC'bat-Dmg/EndRdx:35(43), KntkC'bat-Dmg/Rchg:35(43), KntkC'bat-Dmg/EndRdx/Rchg:35(45)
Level 26: Disembowel -- KntkC'bat-Acc/Dmg:35(A), KntkC'bat-Dmg/EndRdx:35(33), KntkC'bat-Dmg/Rchg:35(33), KntkC'bat-Dmg/EndRdx/Rchg:35(34)
Level 28: Invincibility -- Rec'dRet-ToHit:20(A), Rec'dRet-ToHit/Rchg:20(37), LkGmblr-Rchg+:50(39), LkGmblr-Def/EndRdx:50(39)
Level 30: Resist Energies -- RctvArm-ResDam:40(A), RctvArm-ResDam/EndRdx:40(39), RctvArm-ResDam/Rchg:40(45), RctvArm-ResDam/EndRdx/Rchg:40(46)
Level 32: Head Splitter -- Oblit-Acc/Dmg/EndRdx/Rchg:50(A), Oblit-Dmg:50(36), Oblit-Acc/Rchg:50(36), Oblit-Dmg/Rchg:50(36), Oblit-Acc/Dmg/Rchg:50(37)
Level 35: Tough -- RctvArm-ResDam:40(A), RctvArm-ResDam/EndRdx:40(37), RctvArm-ResDam/EndRdx/Rchg:40(40), RctvArm-EndRdx:40(40), RctvArm-EndRdx/Rchg:40(40)
Level 38: Tough Hide -- LkGmblr-Rchg+:50(A), LkGmblr-Def:50(42), GftotA-Run+:40(42)
Level 41: Resist Elements -- RctvArm-ResDam/EndRdx:40(A), RctvArm-ResDam/Rchg:40(42), RctvArm-ResDam/EndRdx/Rchg:40(43), RctvArm-ResDam:40(46)
Level 44: Conserve Power -- RechRdx-I:50(A), RechRdx-I:50(45)
Level 47: Physical Perfection -- RgnTis-Regen+:30(A), Heal-I:30(48), P'Shift-End%:50(48), P'Shift-EndMod:50(48)
Level 49: Weave -- RedFtn-EndRdx:50(A), RedFtn-Def/EndRdx:50(50), RedFtn-Def/Rchg:50(50), RedFtn-Def/EndRdx/Rchg:50(50)
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Level 1: Brawl -- Empty(A)
Level 1: Sprint -- Empty(A)
Level 2: Rest -- Empty(A)
Level 1: Critical Hit

One advantage of BS/Katana as your primary is the ability to softcap melee/lethal in the ways of Parry/DA. I would definitely try to fit in Parry on your build and have that cover your melee/lethal defense. I would then work on getting f/c/e/n defense with the higher priority going on the e/n. Get your regen and on a hasten less build, HP as high as you can get them.
Here is what I run with currently for comparison.

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I play a Kat/Inv as my main. Katana and BS have basically identical choices so you might want to check out my build in my guide. Link in my sig.