anyone? *meeps* =( =p
Hiya mate 
My opinion might not be reliable since my highest blaster was a L12. Anyway, here it goes:
Fire Blast: 4 seconds recharge (base) - You really want this to fire even faster? Take off that recharge and place it somewhere else.
Fire Ball: I'm guessing most Fire Blasters use it after poping Build Up and Aim (speaking of which you should try to have both pre-30 so you can use it in Sirens) so you really don't need that 2nd accuracy (some players don't even slot it with accuracy).
Ice Sword: I do believe you can take off that recharge. Try to keep in mind that you don't rely on that attack only. You're attack chain will be something like Build Up + Aim + Fire Blast - Blaze - Ice Sword (this for PvP). By the time you're done with this attack chain, you'll always have another power ready to shoot.
Aim and Build Up: As I said before, try to fit both in your pre-30 build so you can use it in Sirens. It really makes a difference. Also, 3recharges are the best slotting. THbuffs are only worth on Aim irrc.
Aid Other - Again, do you really want to waste slots on this? Go Stimulant instead. Stimulant is almost as good as Clarity or Clear Mind (except for the lack of +perception I believe). No need to slot Stimulant (put 1Rech or 1EndRed in the default slot if you like).
Aid Self: Maybe 2Heal2Int2Rech would do better.
Blazing Bolt - It got a base recharge of 12 seconds and you got hasten. Go with 2Acc3Dmg only. Or 1Acc3Dmg if you pop Aim and Build Up first.
Freezing Touch - I'd go 2Acc2Hold2Rech or 2Acc2Hold
As for the Ancillary Pool, I believe either Force or Cold Mastery are the best choices. Force offers you nice S/L resistance, Personal Force Field (really good for PvP and a good power to have with Aid Self) and a "God Mode" (Force of Nature). Cold Mastery got Snow Storm (good to spam and unhide Stalkers) and Hibernate (I love it on my tanker).
Hope this helps a bit 
@False Fiction - Virtue / Defiant
Current projects - [Glaciologist - Ill/Cold Troller] [Cloudshaper - Storm/Dark Def] [Harald Wartooth - Elec/Psi Domi]
Oh, and I think you can cap the flight speed if you go with 3slotted swift instead of hurdle. 3FlightSpeed on Swift and 1 on Fly should cap it. You save a few slots like this.
@False Fiction - Virtue / Defiant
Current projects - [Glaciologist - Ill/Cold Troller] [Cloudshaper - Storm/Dark Def] [Harald Wartooth - Elec/Psi Domi]
Hey all, well I9 is here and respec time!
I'm looking for a PvP/PvE able build and hopefully the one below fills that requirement. Ignore the slotting levels.
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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:
Level: 50
Archetype: Blaster
Primary: Fire Blast
Secondary: Ice Manipulation
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01) --> Fire Blast==> Dmg(1) Dmg(3) Dmg(3) Acc(5) Acc(5) Rechg(7)
01) --> Chilblain==> Acc(1)
02) --> Fire Ball==> Dmg(2) Dmg(7) Dmg(9) Acc(9) Acc(11) Rechg(11)
04) --> Ice Sword==> Dmg(4) Dmg(13) Dmg(13) Acc(15) Acc(15) Rechg(17)
06) --> Hasten==> Rechg(6) Rechg(40) Rechg(40)
08) --> Hurdle==> Jump(8) Jump(43) Jump(43)
10) --> Air Superiority==> Acc(10)
12) --> Aim==> Rechg(12) Rechg(17) TH_Buf(39)
14) --> Fly==> EndRdx(14) Fly(40) Fly(42) Fly(42)
16) --> Health==> Heal(16) Heal(42) Heal(43)
18) --> Blaze==> Dmg(18) Dmg(19) Dmg(19) Acc(21) Acc(21) Rechg(23)
20) --> Stamina==> EndMod(20) EndMod(23) EndMod(25)
22) --> Aid Other==> Heal(22) Heal(37) Heal(37) Rechg(37) Rechg(39) Rechg(39)
24) --> Aid Self==> Heal(24) Heal(25) Heal(27) IntRdx(27) Rechg(34) Rechg(36)
26) --> Super Speed==> Run(26)
28) --> Blazing Bolt==> Dmg(28) Dmg(29) Dmg(29) Acc(31) Acc(31) Rechg(31)
30) --> Build Up==> Rechg(30) Rechg(36) TH_Buf(36)
32) --> Inferno==> Dmg(32) Dmg(33) Dmg(33) Rechg(33) Rechg(34) Rechg(34)
35) --> Freezing Touch==> Acc(35)
38) --> Resuscitate==> Rechg(38)
41) --> Char==> Acc(41)
44) --> Fire Shield==> EndRdx(44) DmgRes(45) DmgRes(45) DmgRes(45)
47) --> Rise of the Phoenix==> Heal(47) Heal(48) EndMod(48) EndMod(48) Rechg(50) Rechg(50)
49) --> Group Fly==> EndRdx(49)
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01) --> Sprint==> Empty(1)
01) --> Brawl==> Empty(1)
02) --> Rest==> Empty(2)
01) --> Defiance==> Empty(1)
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Some power choice reasons:
Flight: One of the reasons I started playing the game and organi will Always have flight, no question.
Aid Other Slotting: Healing Badges (I think resusitate helps with that as well)
I think I've managed to get most of the key powers in before Sirens Call territory.
Comments and Opinions for improvements or alternatives are welcome.