Next time try to spam ques at start of the season, get Diamond quick then afk till end of the season, you are guaranteed to stay in Top100. Your best option now is to learn how to be a good healer and rank up with at least 45%+ win rate (need only 40% wins for earlier ranks). BLM is really not an option as they'll not let you cast in higher tier matches, and SMNs are weaker ranged against BRD and MCH.
The ques definitelly slowed down so I'm OK with just +40 rating every day.