In light of the above I feel like we should want Boston to take 2 of 3 from New York this weekend.
Take the series, hang two Ls on the Yankees, but don't sweep and come out of it with extreme confidence.
Yes, Boston and Toronto still play and if BOS inches closer and sweeps Toronto it could be problematic, but aside from that, Boston has less games remaining to pile up wins if they get hot and they have the harder schedule remaining so they are generally more likely to lose against these stray remaining opponents, compared to New York.