Its seems like once a year this idea comes up. And once a year I post a link to the old list. It's getting more and more dated, as Restrictions come and go, and new cards are printed. However For what its worth here is our old Flash-Rector-Doomsday-Oath Deck...
It doesn't really care about Extirpate, Cabal Therepy, Sphere, even game1 leyline is easily beaten. Duress can be particularly nasty to this deck. But for a fullblown turn1-2 combo deck - this deck is a 10 out of 10 on the fun meter... it has the proverbial "so many insane plays"
To the best of my recollection, here is the deck that Jer was running almost a year ago when flash first was errated. If you look back to the July tournement at myriad games you can see him comming in placed in the mid teens with "Flash Oath" (Note I swapped duress swapped for Thoughseize)
26: Mana
4 Orchard
4 City of Brass
4 Gemstone Mine
1 Tolarian Acad
5 Mox
2 Lotus, Mana Crypt
4 Dark Ritual
2 Cabal Ritual
9: Combo-starters
4 Flash
3 Oath of Druids
2 Doomsday
10: Combo Enablers
4 Academy Rector
1 Krosan Reclaimation
1 Research//Development
3: 6cc Bombs
1 Yawg's bargin
1 Null Profussion
1 Mind's Desire
7: Disruption
4 Cabal Therepy
3 Thoughtseize/Orim's Chant
9: Brokeness/Win
2 DT, Vamp
1 Regrowth
1 Wheel of Fortune
1 Tendrils of Agony
1 Yawg Will
1 Timewalk
1 Rebuild
1 Ancestral Recall
Key Sideboard ------
3 Tidespout Tyrant
1 Oath of Druids
You can click the link at the top of the quote and take a look at the entire thread. Keep in mind the Meta back then was GAT and Flash vrs craploads of GY hate.
The deck had basically a few main Paths to win:
Doomsday for: Recall, Lotus/Mana*, Mana Crypt, Desire, R/D
Cast Recall, your mana, and Desire (make sure you have enough mana before you start)
Hit R/D and return: Tyrant, Mox, Tendrils, (+Duress if you have the storm to cast first if you think they have creature removal).
Cast Tyrant, Mox + the crypt you already have is infinite storm, Tendrils for the win.
Oath in Rector, Therepy him and get the appropriate 6cc Broken Enchantment. And go busted
Flash in Rector, get the appropriate 6cc Broken Enchantment. And go busted.
The third "out" was to Research for your Tidespout Tyrants and just kinda shoddily Mid-game board into TSOath (with a bunch of rectors f-ing things up). Which could be done against 9ball type decks running dudes or decks running Leyline Main, which was common back in the day of Legal crazy flash.
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Anyway It clearly needs an overhaul (at least to make it legal) But it should give you a solid foundation, or at least something to compare to.