No one can actually say that how low scores can go. The average score for FSW is around 380, so it may go down to that number.
I remember Applicants back in 2013-14 used to get Nominations at around 340 so maybe after converting all manual PR applications to EE we are getting back to that level.
The only difference is that Canada used to be the last option for applicants in the past but after Europe, Australia, and other countries have restricted immigrants it has become a popular choice. So we have large number joining the pool every week and therefore, it is difficult to predict when points will go to as low as 380.
At the current trend it takes about a month or so to clear one slab (431-440, 421-430 etc.)