Ziggy, I think your build is a pretty optimal Fire/Fire build. I don't think you need to take Blazing Bolt at 26 unless you really want to though, seeing as Fire/Fire is geared more towards AoE and sniping should be the least of your concerns.
If you plan on slotting it, don't worry about the activation redux, just go for 1 acc and rest damage like the other attacks. An alternative route you can take for Flight Pool is six-slotting Hover with Flight Speed and not take Fly, which allows a decent speed and great for combat. You'll have to slot Inferno a little later, if you take it late, but I took it at 30 and had Inferno 6-slotted by 37.
Stealth is a great pool to take, but don't bother slotting for Defense bonus. If anyone is wondering why take Grant Invis rather than Invis, if you have Stealth and Super Speed, you have 100% ( I think) stealth right there. Invis isn't necessary. The gem in this set is Phase Shift, anyway.
Single target-wise, stick with slotting Fire Blast and Blaze, use those as your main attacks. If you took Flares, please, for the sake of your build, do not slot it. Some say it's a good filler, but it is not worth the slots. Burn isn't worth taking anymore unless you want to try and drop one in when a group is held. No more status protection, so I dropped it from my plan.
For APP I'd agree with Ziggy again. Char is nice, I'd skip Bonfire. Fire Shield has some nice resists and Rise of the Phoenix is alright, if you just want a goof off power. As long as you slot your AoE and take Aim and Build Up, you should be fine.
I actually believed I either teamed with you or ran a TF. Or maybe I'm remembering someone similar >_> Either way, way to go.