I acquired a RtR booster box and it had some great cards for my Izzet deck, so I'm trying to re-think it now (http://deckbox.org/sets/510702). I've added a bunch of awesome cards, taken out a few I didn't ever use a lot or didn't fit in with instants/sorceries (sorry, Molten Primordial), and included an extra Armed//Dangerous, since that combined with a Fluxcharger suddenly makes it bloody awesome. I also traded for two Spellheart Chimeras (finally). But now with 67 cards, I'm not sure which 7 to get rid of, because they all look so good together. Argh.
So the first question is, where are you looking to play this? Casual? FNM? More competitive?
The reason I ask is because as it currently stands, the deck has FAR too many 1-off cards to be consistent. If you're looking to play in any sort of a competitive event, you're really going to want to focus in more on the specific cards that are vital to your strategy.
For casual play, if I were to pick a few cards to remove, they would be the following:
Blistercoil Weird
Archaeomancer
2x Fluxcharger
Dynacharge
Protect // Serve
2x Armed // Dangerous
Teleportal
Traitorous Instinct
and Blast of Genius
I would definitely suggest adding:
Magma Jet
Lightning Strike
Mizzium Mortars
Voyage's End
Cyclonic Rift
and other things of that nature...