Ok, the fire / frost spec that you are talking about is not really an elemental spec, since you take icebarrier and you don't get to go as far as blast wave.
OP, you are right when you say that pvping in any other spec other than 17/34 is cancer, atm unless you got access to items such as r10+ / volatile power / ony ring and other GOOD crit chance items, you will be doing very poorly, also keep in mind that playing without icebarrier is pretty different, I don't mean to discourage you from trying this build, cause it really is a fun build if you want to be killing people, but thats not what you should be doing in PvP, you have 60% slow on 0.5s cast + sheep + CS + novas / cone, your job in "real" pvp more than killing people is to CC and be a cunt, builds with ignite are just better at one thing, killing people.
OP, I have no idea why u spec into imp AE instead of Magic Attunement, you realize that dampen magic is actually mandatory if you are going to be fighting say a warlock or a SP, if you have talents for it, it reduces ALOT of the magic damage you will be taking, you also want 5/5 in arcane missiles since they come in handy in some situations where you will get pushback to africa (hunters when your barrier is down).
this is standard 17/34, like I said the only difference is weather or not you want the 3/3 in Imp Blizz, you seem to think that it's not worth having unless you camp AV bridge, not true, it's the highest % slow in the game and it's undispellable, affects multiple targets and has a chance for frostbite, it all comes down to how you want to play your class, which is why mage is pretty fun.
http://db.vanillagaming.org/?talent#obxVbobZZVVGGkbthoI was honestly never a big fan of the ignite / barrier build that procto is advocating, i'd say if you want to play with ignites you should just go full elemental with blastwave, it makes for a more engaging and fun gameplay, real mages don't use ice barrier
