I reverted back to my original 21/30/0 Fire/Arc path. It's pretty vanilla as far as builds go. Pyro , blastwave, PoM, ICS, etc. I dropped IAM, as I noticed I really don't use it much anymore. Though like concillian pointed out there is more base damage. Now I liked AP a great deal, but everything beyond PoM (more specifically ICS, but PoM has it's uses too) is a big sink in points. I wanted to just try the 21/30 build over a 17(ICS again)/34 build. I just can't let go of ICS for some reason.

If I went 34 over 30 I would only get the 10% crit talent and 30% mana refund on crits, not exactly mind blowing but fairly nice addtions. Or take those extra points and put them into Improved Flamestrike. 21% crit on a nice AoE sounds very useful.
There is something to be said about being able to open with Flamestrike, CoC(now blastwave) let a few Flamestrike ticks through, PoM another flamestrike and start to Arcane Explosion everything in sight. Honestly I really like the added crit on the new "IAE" and the fact you don't have to waste 5 points just to get it instant.
I broke down and bought an eye of flame for 125, cutting into my mount funds, but as I'm only honored with Orgrimmar I'm not exactly close anyways. I'm looking forward to doing the extra 10% fire honestly in a few more levels. Prior to this latest respec, I only had 2/5 in ignite so crits weren't exactly blowing up my skirt. With 5/5 now the procs on 1100+ fireballs do some meaty damage.
Prior to respeccing this last round I ran ST with a few low 50's and a 60 warrior. I topped the meters with over 400k damage, the warrior with 200k, shaman 160k, warlock 120k, and the priest almost nothing. The warlock was practically single target the whole time, I finally suggested at the end to AoE with rain of fire at least when dealing with the little dragons. This was with my new eye of flame, greater fire power, and arcane power pots. I think my +fire was around 200-225ish.
edit: also, another reason to at least dip into the arcane tree...with my WSG trinkets and the new arcane talent I can reduce enemy resistance to my spells by 40 points. Which is nice as anything less than MC gear is going to have all or a large chuck of resistances taken away. Or 30 points with my pvp trinket on, which still is pretty nice.
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edit2:
A pair of warriors (50 &54) was attacking the crossroads while I was on my alt. I picked them off one at a time while they were killing lowbies, then I killed them both at once when they finally teamed up. The 50 logged off, and the 54 didn't rez after that. What I liked about the build, is it provides that PoM sheep in the case of two attackers, or in last nights case a PoM'd pyro. Blastwave to give you some breathing room when working with multiple targets. Also the high damage from crits is very nice now. My mage is still 53.
Still post the big raids, I still view mages AoE as their singular strength. I also find AoE style spec's to work the best as the overall damage dealer. If you focus strictly on single target, you will probably lose to rogues and damage warriors. I've completely swapped out CoC with blastwave, though I might add rank 1 again just for the snares. The damage/mana cost is rather poor. Although you can pop it after the short cooldown, if you use it for damage regularly I've found that I run out of mana quite quickly.
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I will update this post with the latest results of an elemental build, but I have to say I really want to test out this lastest fire/arc build a bit more.