Hey there! So, first piece of advice is to ban your worst matchup, for me, it's Darius. Learn each matchup, figure out the mentality of the typical Fiora/Wukong/Darius player.
some things I can say about this, even though I'm still learning these matchups myself, is that Fioras will go aggressive and attempt to proc her true damage any time she can, remember this, especially when near your tower. If she pushes you in, and tries to poke you down, try to get in range and goo flip her into tower, or, if you can't goo flip, a regular flip will suffice(A goo flip will almost always guarantee a kill low level).
A good Darius knows that they make a Singed's life a living hell, so they'll tend to sit inside the minion wave, slowly farming. The best thing to do in this matchup is ping for a gank, you can't solo him, and you should never try. An armor rush is great against him, and if you get Sunfire, hugging him will deal more damage. Things to note about Darius, it's near impossible to 1v1 him, so don't try. He'll win every time. Sorry about this one, I don't know any sure-fire ways to winning or even going even in this matchup. Go for proxies when you can, but remember, the level one proxy is extremely dangerous, and doesn't give you enough of a reward for doing it. Wait until at least level three to do it(or you can go at two, if you're a brave boy).
For wukong, I don't know much. I've actually never played this matchup.
My typical build for Singed versus a mostly AD comp is:
.
What I tend to build versus Darius:
Then the rest is dependant on the rest of the enemy team. If they're mostly AD for Full AD, I of course build more armor. With the Deadman's lategame, Darius, unless he's additional movement speed other than boots and Deadman's, you will almost always outrun him.
As long as you farm, and try your best to not feed, your lategame will be far better. If any of these counters realize that you're playing too safe to kill, they'll start roaming, at this point, push like crazy, and ensure that the mid or bot knows that they're roaming. ( Ping Missing on your lane and danger on their lanes.)
Bonus tip! If you are a risk taker, build
and
, do a level one proxy, back or execute(whichever comes first), then finish the refillable potion by turning it into
. It gives you amazing sustain in lane. If you do this, make sure to get the mastery which increases potion effectiveness.