Reviving this. Interesting to see 2011 replies pre champ nerfs (I.e, soraka/taric).
Currently for bot lane, I feel thresh/sona/janna/lulu are strongest as supports. As for ADC, either draven, varus, cait or vayne.
At Plat+ Vayne has become a highly picked/banned champion on NA now. Her kit and lategame prowess is beyond comparison. Once you have a BoRK in lane (assuming the other adc isn't miles ahead), you basically dominate and snowball. Even if fallen behind, but you manage to scrap together a PD and BoRK, you are still a massive threat.