First: if they are really going to drop 8 on passing downs, the Rams have the guys who know how to adjust to coverages maybe better than any team in the league.
Kupp especially, but also OBJ are really smart. I wouldn't be surprised to see Jefferson have a big day. KC mainly relies on speed. I don't think anyone would call KC's WRs "smart".
Second: depending on how well the Rams adjust to that many pass defenders, then I would look for the Rams to do more passing on early downs.
Third: it is going to be important to stay ahead of the sticks so that on 3rd down, if the Bengals gamble on dropping 7 or 8, the Rams can make them pay by running.