So that someone else would actually respond this with some non-Alvanian build, here is my take on the subject. I am ignoring some of the wishes of you on the grounds that the nuke is called Dawn Strike and the squid form is called Nova. So you have Nova in this build... but no Dawn Strike.
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Exported from Ver: 1.7.6.0 of the CoH_CoV Character Builder - (http://sherksilver.coldfront.net/index.php)
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Name: Avenger
Level: 50
Archetype: Peacebringer
Primary: Luminous Blast
Secondary: Luminous Aura
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01) --> Gleaming Bolt==> Acc
01) --> Incandescence==> DmgRes
02) --> Shining Shield==> DmgRes DmgRes DmgRes EndRdx
04) --> Essence Boost==> EndRdx Rechg Rechg Heal Heal Heal
06) --> Bright Nova==> EndMod EndMod EndMod TH_Buf TH_Buf TH_Buf
08) --> Hasten==> Rechg Rechg Rechg
10) --> Swift==> Fly Fly Fly
12) --> Build Up==> Rechg Rechg Rechg
14) --> Super Speed==> EndRdx
16) --> Radiant Strike==> Acc Dmg Dmg Dmg
18) --> Incandescent Strike==> Acc Dmg Dmg Dmg
20) --> Health==> Heal
22) --> Stamina==> EndMod EndMod EndMod
24) --> Conserve Energy==> Rechg Rechg Rechg
26) --> Combat Jumping==> EndRdx
28) --> Assault==> EndRdx EndRdx
30) --> Tactics==> EndRdx EndRdx
32) --> Solar Flare==> Acc Dmg Dmg Dmg
35) --> Reform Essence==> Rechg Heal Heal Heal Rechg
38) --> Light Form==> Rechg Rechg Rechg
41) --> Pulsar==> Acc Acc
44) --> Photon Seekers==> Acc Acc Dmg Dmg Dmg
47) --> Restore Essence==> Rechg
49) --> Glowing Touch==> Rechg
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01) --> Sprint==> Empty
01) --> Brawl==> Acc
01) --> Energy Flight==> EndRdx
01) --> Cosmic Balance==> Empty
02) --> Rest==> Rechg
10) --> Combat Flight==> Fly Fly Fly
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06) --> Bright Nova Bolt==> Acc Dmg Dmg Dmg EndRdx Rechg
06) --> Bright Nova Blast==> Acc Dmg Dmg Dmg EndRdx Rechg
06) --> Bright Nova Scatter==> Acc Dmg Dmg Dmg EndRdx Rechg
06) --> Bright Nova Detonation==> Acc Dmg Dmg Dmg EndRdx Rechg
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*Jedi mind trick* You don't want to do Dawn Strike
[b][color=blue]Coldest War /[color=red]/ Omega Patient[/b]
[url="http://www.the-cow.net/"][color=red]The CoW Network (Blog) /[/url][url="http://www.collegeofwar.com/"][color=blue]/ College of War[/url]
Finally got my herobuilder working so give your comments on the build I made 
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Exported from Ver: 1.7.6.0 of the CoH_CoV Character Builder
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Name:
Level: 50
Archetype: Peacebringer
Primary: Luminous Blast
Secondary: Luminous Aura
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01) --> Gleaming Bolt==> Acc(1)
01) --> Incandescence==> DmgRes(1)
02) --> Gleaming Blast==> Dmg(2)Dmg(3)Dmg(3)Acc(45)EndRdx(50)
04) --> Essence Boost==> Rechg(4)Rechg(5)Rechg(5)Heal(42)Heal(43)
06) --> Bright Nova==> EndMod(6)EndMod(27)EndMod(27)TH_Buf(29)TH_Buf(29)TH_Buf(31)
08) --> Radiant Strike==> Dmg(8)Dmg(40)Dmg(42)Acc(42)EndRdx(50)
10) --> Shining Shield==> DmgRes(10)
12) --> Swift==> Run(12)
14) --> Health==> Heal(14)
16) --> Build Up==> Rechg(16)
18) --> Incandescent Strike==> Dmg(18)Dmg(39)Dmg(40)Acc(40)EndRdx(46)
20) --> Stamina==> EndMod(20)EndMod(31)EndMod(31)
22) --> Reform Essence==> Heal(22)Heal(34)Heal(37)Rechg(37)Rechg(37)
24) --> Hasten==> Rechg(24)Rechg(33)Rechg(33)
26) --> Solar Flare==> Dmg(26)Dmg(43)Dmg(43)Acc(45)EndRdx(45)
28) --> Super Speed==> Run(28)
30) --> Pulsar==> Acc(30)
32) --> Photon Seekers==> Dmg(32)Dmg(33)Dmg(34)Acc(34)Rechg(46)
35) --> Dawn Strike==> Dmg(35)Dmg(36)Dmg(36)Acc(36)Rechg(46)
38) --> Light Form==> Rechg(38)Rechg(39)Rechg(39)
41) --> Quantum Shield==> DmgRes(41)
44) --> Thermal Shield==> DmgRes(44)
47) --> Luminous Detonation==> Dmg(47)Dmg(48)Dmg(48)Acc(48)EndRdx(50)
49) --> Restore Essence==> Rechg(49)
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01) --> Power Slide==> Empty(1)
01) --> Power Quick==> Empty(1)
01) --> Sprint==> Empty(1)
01) --> Brawl==> Empty(1)
01) --> Energy Flight==> Empty(1)
01) --> Cosmic Balance==> Empty(1)
02) --> Rest==> Empty(2)
10) --> Combat Flight==> Empty(10)
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06) --> Bright Nova Bolt==> Dmg(6)Dmg(7)Dmg(7)Acc(9)Rechg(9)EndRdx(11)
06) --> Bright Nova Blast==> Dmg(6)Dmg(11)Dmg(13)Acc(13)Rechg(15)EndRdx(15)
06) --> Bright Nova Scatter==> Dmg(6)Dmg(17)Dmg(17)Rechg(19)Acc(19)EndRdx(21)
06) --> Bright Nova Detonation==> Dmg(6)Dmg(21)Dmg(23)Acc(23)EndRdx(25)Rechg(25)
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It's gonna be a 50 respec so dont care about the slot levels :P
- @DSorrow - alts on Union and Freedom mostly -
Currently playing as Castigation on Freedom
My Katana/Inv Guide
Anyone who doesn't take truth seriously in small matters cannot be trusted in large ones either. -Einstein
Quick question. You said you are going to spend time in Nova until light form is recharged and then use that. Will you be spending anytime in human at all? If not and you wil only be in nova or LF I can see a few things I might change.
I like your proposed build.
Personally - my thoughts are
3 To-Hit debuffs and then an accuracy in every attack in Nova is over kill. You could slot only 2 to-hits and still be able to hit +3's consistently.
Take a to-hit out of the form and give it to Build Up for RecRed, would be my advice. Having that power boost up more often for things like IS/RS alpha strikes (or for going into Nova) is better in my opinion.
Also - with just 2 End mod in Nova and then EndRed in all the atttacks - you would be fine. Alternatively leave in 3 if you want - but take a couple of EndRed out of powers like Nova Blast and Nova Bolt - which aren't very End heavy and give the slots to Pulsar for a much better Crowd control power than it would be with just one accuracy in it. If I'm not mistaken - Build UP, Pulsar and then Dawn Strike will mean that you are a formidable atom-bomb and some of the mob will still disoriented in the event that DS doesn't kill them completely - much better for mitigating any retaliation DS might bring but you need Disorient Duration in there to pull that off.
Also - you're attack chain in Nova doesn't really require a recharge in Nova Bolt. Take that out and maybe the one from Nova Blast too and stick those slots into Light Form if thats where you want to spend alot of time - as DamRes. If you have Hasten and you are in and out of Human form - stick Hasten on Auto so it kicks in the moment you are in Human and alot of times Hasten will be speeding up your chain in Nova anyway.
Its good but some things are needlessly sacrificed in favour of overkill somewhere else...
Justt my two-cents.
I thought I'd ask for some help here as my hero builder wont work right now... If anyone can get a build with these requirements I'd be very happy
1. hasten and super speed
2. 6 slotted squid and squid powers
3. 3 recharge in light form
What I'm looking forward to doing is spending time in squid until light form is ready and then go do IS, seekers and nova
- @DSorrow - alts on Union and Freedom mostly -
Currently playing as Castigation on Freedom
My Katana/Inv Guide
Anyone who doesn't take truth seriously in small matters cannot be trusted in large ones either. -Einstein