I don't love Johnny Storm or Darcy/Johnny (though the fic does a solid job of selling both), but OMG DARCY!!!
This didn't actually get me into the habit of reading fic, but then today fox1013 posted "Darcy Lewis's Guide to Lists" and it's the same awesome Darcy! Fandom, I love you!
So then I actually clicked on the "Darcy Lewis" tag on A03 and the fic at the top of the list was: "A Light Into My Darkness" by Selenay
Same awesome Darcy! And the pairing totally worked for me here.
[NGL, I am now apprehensive to read any more fics lest I break my streak.]