A good Singed is overpowered. Luckily there are not that many good Singed players.

I play ap nidalee and have no problems with any of those champs. If darius or singed manage to get farmed and have lvl advantage I still hit 1/5 of their hp without them stepping on trap. They hide behind their teammates after a hit or 2.
Don't even get me started on teemo. I laugh at teemo. I have way more traps out than his shrooms, and with blackfire he wont want to lay shrooms anymore.

I think the last match on TT I was in was against a good Riven, Singed and Garen. It was a great game. Lets just say that Riven was raged when the game was over. My team was Kayle, Voli and Nocturne. We got face stomped for most of the match. A good ace on my teams part is what finished it.

Jax owns darius so hard its not even funny

I find it easy to shut down Teemo... I just get an early Aegis and YAKUHHH him with Lee Sin