Currently, the 8th seed (Mavs) are 3 games over .500. The Mavs next game is home against the Hawks, so it's safe to assume that they'll be 4 games over .500.
Then I'll assume that 4 games over .500 is going to be the minimum for the 8th seed. That means 45 wins, but last year the 8th seed was 6 games over .500. I'll just split the difference and say 46 wins, which is a tough win total to reach after being so bad last year. Reaching that would involve a trade of some sorts.
FWIW, I'm projecting lower win total for 8th seed this year simply because the higher level of competition in the west will slightly flatten the win distributions overall. There is (in my opinion) far less terrible teams this year, so wins will be harder to come by for everyone.