yea forget that, is energy/energy good?
Ice/energy is the PVP FoTM, and in the arena ranks as one of (if not THE) best blaster.
Energy/energy has "meh" ST damage compared to ice, "meh" AoE damagae compared to fire, and knockback, generally an undesirable affect compared to something as useful as a slow or properly used end drain.
Not saying KB is bad. It can be used very well. It's just it's more often bad than good.
Differnt strokes for different folks is my summary of blaster powersets, far more variation than it looks like on the surface. As ever I am no expert but a couple of quick opinions on those you have mentioned...
Ice/Energy: Decent but not immense damge but a very nice secondary effect from your primary the slow can be really good. Energy might not synergise too well if you are planning on keeping your distance, which is the impression I got, as its really at its best dealing high damage and stun up close and personal.
Ice/Elec: Primary as above (obviously). Elec will again give you excellent up close effect including Endurance drain but see above regarding the issue of getting up close.
Energy/Energy: Can be really rather good though after having it on my defender the blast isn't a favorite of mine, solid ranged damage and Knockback though not as amazing as some secondary effects can be well used (if you can get used to it). Same issue with Energy secondary as above though.
As I have mentioned that Energy and Elec Manipulation are a bit up close and personal for a blaster at distance I might suggest a look at devices if you really are going to want to keep the enemy at arms reach. Personally as a recent convert I can recommend embracing the way of the Blapper though, both Energy and Elec manipulation have some fantastic up close attacks and its a good laugh.
Hope thats at least vaguely helpful. 
Cheers,
White 
After testing out a couple builds, and reading up a bit more (mainly to see what each build is like later on) I find myself truely stuck :/
Fire/Fire looked like lots of fun, but finding out its weakness in later game, with agro, soloing and pvp it seems its not for anyone.
Basicaly i want to do pvp, as well as damage in pve.
My usual tactic in PvP games is not so complicate. Kill them fast, and be gone again before they read "hospital".
I dont like Archery, or AR and not to keen on sonic either. Elementals are my thing. Anyone who experienced Fire/Fire can tell me if what i said is wrong, or if it is possibnle to solo, pvp effectively and work in teams with these powers? Elec seems to be other top damager, but havnt heard much about its pvp situation, or compared to in solo and teams. (ill probaly be palying with another blaster of some sort, but would like to be able to play independently and not rely on others). Thanks for replies White and Seriphos
Getting to grips with blasters can be a challenge, it was for me took a good while to find sets that suit me tbh. In an attempt to be vaguely helpful...
Fire/Fire issues: Fire/Fire is a setup I never could quite get to suit me. But I have teamed with a couple of very good Fire/Fire blasters and they can work as a the damage deal in a team pretty well but the AoE can be an aggro magnet. AFAIK Fire isn't particularly favoured in PvP as its not really got a secondary effect besides the DoT and so is perhaps best suited to PvE, I am certain that their are some with decent PvP fire blasters who will add to the discussion though.
Elec: My own PvP Blaster project is Elec/Energy and is pretty solid in PvE as well. Its PvP rep is pretty good tbh and with reason the Endurence it can drain from enemies is a great secondary effect and it has all the damage you could want As to not wanting to rely on others and thus being able to solo, the short answer is Oh yes you can and really very well! the end drain is really handy and you get access to Tesla Cage a good solid hold, your damage deals as I said strong and its flexable in the ways you can use it. Team wise with elec you can do the blaster job just as well as the other sets. Choice of your second power set can help define your style for example the one I am working on is with Energy Manipulation very much an up close and personal blapper type. Overall I can recomend Elec as a great fun set to try, give it a go you may well like it
I hope you find a setup that suits you soon and that I have been of some help.
On a less serious note...
*Is quietly awaiting the catch phrase of Plight*
Cheers,
White
elec/elec is a winner in pvp and pve, great damage and control mechanisms. Short circuit + power sink means you can drain entire mobs of their endurance almost instantly meaning they cannot attack while you and your team destroy them. My elec/elec was actually playing tank (sucessfully) on a recent TF after our tank DCd.
The damage is as good as it gets for blaster secondaries
Mine has 3 single target holds and can make people much bfs pretty damn quickly and can break mez protection very quickly.
I really recommend it.
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Like Botty said, elec is nice . MAgus is right when he says that elec is flexible; while it plays fine at range (barring the 100% energy typed damage issue with a few mobs/PCs late ron), it is mental up close, with nothe AoE drainer you can tank from the late DO/early SO point, soloes fine from any level but take note of levels 18, 35 and 38 for particularly play changing powers. Can tank easily in a good team, esp with res and/or def buffs. Allr ound better than any other build although not as strong as some at a very few things imo.
But I wouldn't know much 
Plight
Hiya, im a newbie to the game, tried to play a fire/kin controller, and just found the dots borring tbh, and wanted some more instant damage.
I wanted to use Ice as something that keeps them away, and then Lightning or energy for extra damage. But i didnt know which to choose, or which to choose as primary or secondary. Help would be much appreciated