+ If you're going for a ranged blaster then ice, fire or sonic primary is usually best.
+ If you're going for a "Stalker Hunter" then take /devices for the +perc (see above for primaries)
+ If you're going for a "Blapper" then /NRG or /Elec is the only real way to go.
+ If you're going for End drain it's gotta be elec/elec or elec/nrg.
+ If you want a "blastroller" then the ice primary and secondaries will do well.
Other toons will probably do fine, but those are the majority of the "cookie cutter" builds I've seen. 
Ice/Energy is the best on paper, although I find against certain specific builds, other blasters may fair better.
Primaries
Fire is an AOE based primary, Flares is not a good attack (long animation) which really messes up a single target attack chain, no holds, no other nifty effects at all. In other words, not the best.
Ice has good single target damage, a good quick firing hold, and some slowing capabilities.
Elec has weaker single target damage, a pet which some people find handy in PvP, a single hold, but with a longer animation than the best of the two ice holds. It's OK, but Ice is better in my opinion.
Energy also has pretty reasonable single target damage, but you wont find many people without knockback protection in a PvP zone, let alone the arena.
Secondaries
Of the secondaries, Energy has a lot of very useful tools, Power Boost and Conserve Power being the two most noticable ones. You also have stuns in your mele attacks rather than holds, and they're in your attacks, which is very useful.
Elec is also quite good, does good damage, has a decent quick firing mele hold, but doesn't have all the other nifty tools.
Ice secondary is generally not liked for PvP, I find for team PvP my Ice/Ice/Cold is actually very good, slows are not often resisted, so in a zone I get quite a lot of mileage out of her. I'd need to change epic to make her affective in the arena though.
Devices is pretty reasonable for zone PvP.Telemining (ie teleport the bad guys on to mines and caltrops) can be very effective, I'm not a big fan of the set other than that though.
If you're looking to solo PvP at all then Force Mastery and the Medicine Pool (aid self, 6 slotted, 2 interrupt durations in there) are an extremely big advantage, regardless of the rest of the set.
To a degree they're what you make of them though.
Edited: To remove a comic typo which really changed the meaning of the thing.
There are lot of other threads on the subject, take a look at the rest of this forum..
thanks a lot guys, figured i'll try ice/nrg, not the most damaging set but the slows and knockbacks should be good.
thoughts on a build geared towards pvp? mainly solo pvp really.
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igured i'll try ice/nrg, not the most damaging set but the slows and knockbacks should be good.
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Ice/Energy is the highest single target damage combination you can come up with. A total of six good single target attacks (three ranged, three mele) mostly quick firing.
There is only one attack which does knockback (Power Push), the rest of the secondary attacks have varying chances to stun.
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Fire is an AOE based primary, Flares is not a good attack (long animation) which really messes up a single target attack chain, no holds, no other nifty effects at all. In other words, not the best.
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Oh really? Well i seem to find Blaze and Blazing Bolt very handy in PvP 
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There is only one attack which does knockback (Power Push), the rest of the secondary attacks have varying chances to stun.
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Power push is energy primary attack, you mean power thrust. (I admit the power X attacks sound similar)
thank you for all your advice guys 
look forward to owning you all soon
Play the Sonic please!
What u guys are about? Everybody knows that best PvP blaster is Archery/sonic!!
Sonic>Fire
Sonic>AR
Sonic>Ice
Sonic>Archery
Sonic>Energy
never tried sonic, not exactly my thing being able to scream really really loud lol
lol blasters cant even have sonic as a secondary O.o
that kinda make archery/sonic and AR/sonic little hard :P
p.s how about ice/ice blaster for pvp? better/equal to ice/nrg? would make it easier for costume design
EDIT: bad spellings
Ice/Energy is probaly the best PvP blaster you'll come across atm.
And he meant Archery/Sonic, as in both the primaries.
ok thanks jummy ice/energy it is then
No one loves the sonic. 
maybe because its rubbish?
no not really just not enough in it compared to rest and personally a snowball would do more damage than shouting at someone
When you hit 50, I'll be waiting for you.
lol in a few years time ^^
jum will be old by then, woot easy old man victory
and suggestions on a ice/energy build? would like to take super speed and medicine but not sacrifice damage and i cant seem to be able to do that. its not so much the slotting that im stuck with its keeping all the main abilities
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There is only one attack which does knockback (Power Push), the rest of the secondary attacks have varying chances to stun.
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Power push is energy primary attack, you mean power thrust. (I admit the power X attacks sound similar)
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I do. I tend to mix the names of those two powers up. Have the same problem with Lightning Bolt and Charged Bolts (I think my mind things the "Bolts" attack should be the one that's the two handed attack with two bolts, but it isn't) which led to an unfortunate screw up on a level 50 respec one time.
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lol blasters cant even have sonic as a secondary O.o
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These guys are pulling your leg
in your experience which types would be better in pvp as a blaster?
thoughts on this?
I was wanting to try fire/energy and slot power thrust for accuracy loads but im not sure if power boost does anything to the burn after effects, anyone know?
I know most people seem to be recommending elec types but i already have 2 defenders with elec so getting kinda boring now
of course i would end up taking medicine pool and maybe ss just for the hasten. seen as blasters meant for damage might as well increase speed of the best attacks