My current faves are kk, ds, void pit def lines. They keep me in top 5 platinum or challenger if I feel like it.
Edit: just read this again. Kinda makes no sense without the qualifier 'I like when others use these in pit.' Because they are fun for me to kill, almost everyone is doing it, and it's zero challenge to beat it anymore. But, by not using them, I'm collecting tokens bcuz it makes people return to the need to think about how to beat a different combo than the sameo.