Here's my current build for you. It's by no means super-briliant or anything but I enjoy it! There's a few choices I've made might need explaining but I'll do that at the end...
Exported from version 1.5C of CoH Planner
http://joechott.com/coh
Archetype: Blaster
Primary Powers - Ranged : Energy Blast
Secondary Powers - Support : Ice Manipulation
01 : Chilblain acc(01) immdur(46)
01 : Power Bolt acc(01) dam(5) dam(15) dam(23) recred(43) endred(43)
02 : Power Blast acc(02) dam(3) dam(3) dam(11) recred(25) endred(39)
04 : Energy Torrent acc(04) dam(5) dam(19) dam(19) recred(34) conrng(40)
06 : Power Burst acc(06) dam(7) dam(7) dam(11) recred(25) endred(40)
08 : Sniper Blast acc(08) dam(9) dam(9) dam(13) recred(31) recred(46)
10 : Hasten recred(10) recred(13) recred(15)
12 : Hurdle jmp(12)
14 : Super Speed runspd(14)
16 : Build Up recred(16) recred(17) recred(17)
18 : Health hel(18) hel(31) hel(37)
20 : Stamina endrec(20) endrec(21) endrec(21)
22 : Ice Patch recred(22) recred(23) recred(46)
24 : Stealth endred(24)
26 : Aim recred(26) recred(27) recred(27)
28 : Explosive Blast acc(28) dam(29) dam(29) dam(40) recred(42) endred(43)
30 : Power Push acc(30) recred(31)
32 : Nova acc(32) dam(33) dam(33) dam(33) recred(34) recred(34)
35 : Freezing Touch acc(35) acc(36) hlddur(36) hlddur(36) hlddur(37) recred(37)
38 : Hover fltspd(38) fltspd(39) fltspd(39)
41 : Fly fltspd(41) fltspd(42) fltspd(42)
44 : Snow Storm endred(44) endred(45) slw(45) slw(45)
47 : Flash Freeze recred(47) recred(48) recred(48) slpdur(48) slpdur(50) slpdur(50)
49 : Hibernate recred(49) recred(50)
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01 : Brawl enhancement(01)
01 : Sprint enhancement(01)
02 : Rest enhancement(02)
I originally started with flight as a travel power, but still needed Hasten, so everything else was pushed back by a couple of levels, so I respec'd into superspeed at 14 instead. I hate Superspeed as a travel power, so I also included Fly later in my build, just for my own quality of life (and the Shadow Shard TFs).
Hover is pretty useful too, as it turns my knockback into knockdown, which helps keep the baddies on my ice patch, and it keeps the tanks and scrappers happy!
Power Push is not everyone's cup of tea, but it's a lifesaver for me. I use it constantly.
Also, it was a tough choice between Shiver and Snow Storm for me...I sacrificed Shiver for Fly and went with Snow Storm in the end, but my previous build had them both and only one travel power (fly at the time). Shiver is the better out of the two I feel, but snow storm opens up the Cold Mastery pool, which has some excellent powers.
PvE-wise...the Flash Freeze is one of the best powers I have. I can sleep a whole bunch of mobs, then single-target blast them to death. With this slotting and hasten running, it's usualy back up before they wake up (depends on what level they are) so I can hit them again and carry on. Once slept, I can easily cycle through them, find the nasty ones and use Freezing Touch on them.
I don't PvP a lot, and I don't get into melee often so I didn't get Ice Sword, though I hear it's very good for de-toggling in PvP.
Ice Patch I find to be the best PvP tool for me, especially in the maps with water...stick an ice patch underwater, pretend to be a helpless little blaster for a few seconds and invariably some tough guy wannabe comes along and tries to get you. Nothing more satisfying than watching them fall over as soon as they hit melee range, jumping into a hover and blasting them to death in a few easy shots! Mwa ha haaaa! Suckers!!
I think that's the beauty of this build...no-one expects it and there's so many little things you can use to save yourself. Ice patch, snow storm, sleep, freezing touch, power push...then hibernate when it all goes wrong! Gotta love it!
Ciao!
Edited for some shockin typos! I'm tired!