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Electromancer is pretty terrible. All the spells it was good with got cut.

I've seen the Japanese list and it's interesting. I'm not sure what matchups it's supposed to be better in. It's taking a...

Noxious Revival is basically dead until you're going off. You'll notice I strictly limited the amount of cards that are in that position.

Something like this:

4 Pyromancer Ascension
1 Grapeshot
1 Past in Flames
4 Sleight of Hand
4 Serum Visions
4 Gitaxian Probe
4 Thought Scour
4 Faithless Looting

So a few thoughts on your list:
1) I originally had both Pyretic and Desperate Ritual. I was finding that I was drawing them too often and they weren't good enough. I cut Pyretic and was never sad...

Sulfur Falls is fine. I actually kept it on a one-lander and it was totally okay. I went 5-3 at the local PTQ, with my losses in basically equal parts skill and luck.

My sideboard was:
2...

If you ever get to copy a Manamorphose with Pyromancer Ascension, you basically can't lose. On a typical good draw, you'll cast Ascension on turn 2, make it active on turn 3, and kill on turn 4.
...

4 Pyromancer Ascension
1 Grapeshot
1 Past in Flames

4 Sleight of Hand
4 Serum Visions
4 Gitaxian Probe
4 Thought Scour
3 Desperate Ravings