sub 20 was very hard, however once i broke i somehow got way better, atleast it felt like that. the worst ao5s i get atm are low 19s, even 18.xx sucks for me now lol. im trying on a sub 15 avg and sub 10 single atm. however i would say i avg 18-19 cause im so inconsitent, but thats not the topic lol. so yeah, sub 20 was really hard to get but once i got it it got very easy to get sub 20 avgs.