Well, you asked for a build so here's the one I use... Hero Plan by Mids' Hero Designer 1.401
http://www.cohplanner.com/
[u]Click this DataLink to open the build![u]
Celestial Drifter: Level 50 Natural Peacebringer
Primary Power Set: Luminous Blast
Secondary Power Set: Luminous Aura
Power Pool: Speed
Power Pool: Medicine
Hero Profile:
Level 1: Glinting Eye -- Acc(A), Dmg(7), Dmg(7), Dmg(9)
Level 1: Incandescence -- ResDam(A)
Level 2: Gleaming Blast -- Acc(A), Dmg(3), Dmg(3), Dmg(9), RechRdx(11), RechRdx(11)
Level 4: Essence Boost -- RechRdx(A), RechRdx(5), RechRdx(5)
Level 6: Hasten -- RechRdx(A), RechRdx(17), RechRdx(17)
Level 8: Aid Other -- Heal(A)
Level 10: Radiant Strike -- Acc(A), Dmg(13), RechRdx(13), Dmg(15), RechRdx(15), Dmg(19)
Level 12: Build Up -- RechRdx(A), RechRdx(23), RechRdx(23)
Level 14: Shining Shield -- EndRdx(A)
Level 16: Thermal Shield -- EndRdx(A)
Level 18: Incandescent Strike -- Acc(A), Dmg(19), Dmg(31), Dmg(36), EndRdx(45), RechRdx(45)
Level 20: White Dwarf -- ResDam(A), ResDam(21), ResDam(21)
Level 22: Reform Essence -- Heal(A)
Level 24: Conserve Energy -- RechRdx(A), RechRdx(25), RechRdx(25)
Level 26: Pulsar -- Acc(A), Acc(27), Dsrnt(27), Dsrnt(50)
Level 28: Quantum Flight -- EndRdx(A)
Level 30: Solar Flare -- Acc(A), Dmg(37), Dmg(37), Dmg(39), RechRdx(46), EndRdx(46)
Level 32: Dawn Strike -- Acc(A), Dmg(33), Dmg(33), Dmg(33), RechRdx(48), RechRdx(48)
Level 35: Photon Seekers -- Dmg(A), Dmg(36), Dmg(36), RechRdx(48)
Level 38: Light Form -- RechRdx(A), RechRdx(39), RechRdx(39), ResDam(40), EndMod(42), EndMod(42)
Level 41: Restore Essence -- RechRdx(A)
Level 44: Glowing Touch -- Heal(A), Heal(50)
Level 47: Group Energy Flight -- EndRdx(A)
Level 49: Super Speed -- Run(A)
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Level 1: Brawl -- Acc(A)
Level 1: Sprint -- Run(A)
Level 2: Rest -- RechRdx(A)
Level 1: Cosmic Balance
Level 1: Energy Flight -- Flight(A)
Level 10: Combat Flight -- Flight(A)
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Level 20: White Dwarf Strike -- Acc(A), Dmg(34), Dmg(43), Dmg(45), Acc(46)
Level 20: White Dwarf Smite -- Acc(A), Dmg(31), Dmg(34), RechRdx(42), Dmg(43), EndRdx(43)
Level 20: White Dwarf Flare -- Acc(A), Dmg(29), Dmg(29), Dmg(34), RechRdx(40), EndRdx(50)
Level 20: White Dwarf Sublimation -- Heal(A), Heal(31), Heal(37), RechRdx(40)
Level 20: White Dwarf Antagonize -- Taunt(A)
Level 20: White Dwarf Step -- EndRdx(A)
Now a few comments. I know that you said you're looking to blast but I found the melee attacks in human form do considerably more damage than the blasts. Typically if there's already a tank I use my character as a pseudo scrapper with some support abilities. In human form you have extremely high damage melee attacks and can dish out some decent dps as well. I heavily slotted my Dwarf form and because of this the Dwarf can do some decent damage as well and with it's heavy resists and sublimation the Dwarf has a lot of staying power.
Note that I'm not the greatest player. I'm actually pretty casual but I've had no problems running with this build, even with single origins. On top of this I can tank pretty well and do some mean damage when I feel like it. I hope that this helps! 
Thanks so much, Rhyltran! I might end up tweaking it just a TINY bit. But that build looks fantastic. Thank you. ^^
No problem! Glad you like it.
I like that build also so I tweaked it a little and put some IO sets in to try to ehance the recharge, accuracy and def/resistance.
Hero Plan by Mids' Hero Designer 1.401
http://www.cohplanner.com/
[u]Click this DataLink to open the build![u]
Sunlight Dragon 2: Level 50 Natural Peacebringer
Primary Power Set: Luminous Blast
Secondary Power Set: Luminous Aura
Power Pool: Speed
Power Pool: Medicine
Power Pool: Concealment
Hero Profile:
Level 1: Glinting Eye -- Thundr-Acc/Dmg(A), Thundr-Dmg/EndRdx(7), Thundr-Dmg/Rchg(7), Thundr-Acc/Dmg/EndRdx(9)
Level 1: Incandescence -- S'fstPrt-ResDam/Def+(A)
Level 2: Gleaming Blast -- Apoc-Dmg(A), Apoc-Dmg/Rchg(3), Apoc-Dmg/EndRdx(3), Apoc-Dam%(9), Apoc-Acc/Dmg/Rchg(11), Apoc-Acc/Rchg(11)
Level 4: Essence Boost -- Numna-Heal(A), Numna-Heal/Rchg(5), Numna-Heal/EndRdx/Rchg(5)
Level 6: Hasten -- RechRdx-I(A), RechRdx-I(31), RechRdx-I(37)
Level 8: Aid Other -- Mrcl-Rcvry+(A)
Level 10: Radiant Strike -- Hectmb-Dmg(A), Hectmb-Dmg/Rchg(13), Hectmb-Dmg/EndRdx(13), Hectmb-Dam%(15), Hectmb-Acc/Dmg/Rchg(15), Hectmb-Acc/Rchg(19)
Level 12: Build Up -- Rec'dRet-ToHit(A), Rec'dRet-Pcptn(17), Rec'dRet-ToHit/Rchg(17)
Level 14: Super Speed -- Run-I(A)
Level 16: Stealth -- LkGmblr-Rchg+(A)
Level 18: Incandescent Strike -- C'ngImp-Acc/Dmg(A), C'ngImp-Dmg/EndRdx(19), C'ngImp-Dmg/Rchg(31), C'ngImp-Acc/Dmg/Rchg(36), C'ngImp-Acc/Dmg/EndRdx(45), C'ngImp-Dmg/EndRdx/Rchg(45)
Level 20: White Dwarf -- ImpArm-ResDam(A), ImpArm-ResDam/EndRdx(21), ImpArm-ResDam/EndRdx/Rchg(23), ImpArm-ResPsi(25)
Level 22: Reform Essence -- Numna-Heal(A), Numna-Regen/Rcvry+(34), Numna-Heal/Rchg(42)
Level 24: Conserve Energy -- RechRdx-I(A), RechRdx-I(42)
Level 26: Pulsar -- Amaze-Stun(A), Amaze-Acc/Stun/Rchg(50)
Level 28: Quantum Flight -- EndRdx-I(A)
Level 30: Solar Flare -- Oblit-Dmg(A), Oblit-Acc/Rchg(37), Oblit-Dmg/Rchg(37), Oblit-%Dam(39), Oblit-Acc/Dmg/EndRdx/Rchg(46), Oblit-Acc/Dmg/Rchg(46)
Level 32: Photon Seekers -- S'bndAl-Dmg(A), S'bndAl-Dmg/Rchg(33), S'bndAl-Acc/Rchg(33), S'bndAl-Dmg/EndRdx(33), S'bndAl-Build%(48), S'bndAl-Acc/Dmg/Rchg(48)
Level 35: Shining Shield -- RctvArm-ResDam(A), RctvArm-ResDam/EndRdx/Rchg(36), RctvArm-ResDam/EndRdx(36), RctvArm-ResDam/Rchg(48)
Level 38: Light Form -- RctvArm-ResDam(A), RctvArm-ResDam/EndRdx(39), RctvArm-ResDam/Rchg(39), RctvArm-ResDam/EndRdx/Rchg(40), RctvArm-EndRdx/Rchg(42)
Level 41: Restore Essence -- RechRdx-I(A)
Level 44: Glowing Touch -- Numna-Heal(A), Numna-Heal/EndRdx(50)
Level 47: Thermal Shield -- Aegis-ResDam/EndRdx(A)
Level 49: Quantum Shield -- ImpArm-ResDam/EndRdx(A)
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Level 1: Brawl -- Acc-I(A)
Level 1: Sprint -- Clrty-Stlth(A)
Level 2: Rest -- RechRdx-I(A)
Level 1: Cosmic Balance
Level 1: Energy Flight -- Flight-I(A)
Level 10: Combat Flight -- LkGmblr-Rchg+(A)
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Level 20: White Dwarf Strike -- T'Death-Acc/Dmg(A), T'Death-Dmg/EndRdx(34), T'Death-Dmg/Rchg(43), T'Death-Acc/Dmg/EndRdx(45), T'Death-Dam%(46)
Level 20: White Dwarf Smite -- Mako-Acc/Dmg(A), Mako-Dmg/EndRdx(21), Mako-Dmg/Rchg(27), Mako-Dam%(29), Mako-Acc/Dmg/EndRdx/Rchg(43), Mako-Acc/EndRdx/Rchg(43)
Level 20: White Dwarf Flare -- Oblit-Dmg(A), Oblit-Acc/Dmg/EndRdx/Rchg(23), Oblit-%Dam(31), Oblit-Acc/Rchg(34), Oblit-Dmg/Rchg(40), Oblit-Acc/Dmg/Rchg(50)
Level 20: White Dwarf Sublimation -- Dct'dW-Heal(A), Dct'dW-Heal/EndRdx(25), Dct'dW-Heal/Rchg(27), Dct'dW-Rchg(29), Dct'dW-Heal/EndRdx/Rchg(40)
Level 20: White Dwarf Antagonize -- Taunt-I(A)
Level 20: White Dwarf Step -- EndRdx-I(A)
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[u]Set Bonus Totals:[u]<ul type="square">[*]19.5% DamageBuff(Smashing)[*]19.5% DamageBuff(Lethal)[*]19.5% DamageBuff(Fire)[*]19.5% DamageBuff(Cold)[*]19.5% DamageBuff(Energy)[*]19.5% DamageBuff(Negative)[*]19.5% DamageBuff(Toxic)[*]19.5% DamageBuff(Psionic)[*]11.1% Defense(Smashing)[*]11.1% Defense(Lethal)[*]3.63% Defense(Fire)[*]3.63% Defense(Cold)[*]9.88% Defense(Energy)[*]9.88% Defense(Negative)[*]14.9% Defense(Psionic)[*]12.7% Defense(Melee)[*]9.25% Defense(Ranged)[*]4.25% Defense(AoE)[*]2.25% Max End[*]55% Enhancement(RechargeTime)[*]4% Enhancement(Heal)[*]47% Enhancement(Accuracy)[*]148.6 HP (13.9%) HitPoints[*]MezResist(Held) 10.5%[*]MezResist(Immobilize) 10.5%[*]MezResist(Stun) 4.4%[*]MezResist(Terrorized) 2.2%[*]20% Perception[*]12.5% (0.21 End/sec) Recovery[*]74% (3.31 HP/sec) Regeneration[*]3.78% Resistance(Fire)[*]3.78% Resistance(Cold)[*]5% Resistance(Toxic)[*]4.75% Resistance(Psionic)[/list]
I would like a critque of my build maybe further improve the recharge, accuracy and def/resistance.
Normally.. I'm a Villain guy. But lately, I've been playing Heroes alot more. And I've been watching all these /great/ Peacebringers tank AE missions. And I gotta say.. It looks /fantastic/. I've never gotten one past 24 before, and that was a few years ago. And he was a poorly slotted Tri-Form.(He was my first one, c'mon! All the powers looked sexy back then!
)
But if anyone could help me.. Build one, or post a Duo form build, I'd be really happy! Looking to Tank, and Blast in Human form. Depending on what's needed more.