Not playing sl anymore but, few months ago it was:
Endgame: Chinesekid, Boejangles, Kanozaki, Hellcharger, Mrsberry and Auronn. That's all probably.
Lvl 20 - Mrsberry's alt and Asazaocave.
Lvl 15 - Me, Nightmech and Spartanzz pretty much destroyed everyone. Other good ones : Twinkozaki, Goatinferno, Twinkerella(Ardon), Amanita.