The greatest champs globally to counter 소라카 include 징크스, 사미라, and 코그모. These picks are all good at countering 소라카 with high win rates over 57%. Even if these 소라카 counter picks are not chosen in the same position as you, it's not smart to play her into one of these matchups. They will often crush 소라카.
Yet, if the other team choses either 럼블 or 스카너, you should seriously consider selecting her, as she easily wins against these selections with win rates over 53% against each ofthem.