Interesting, but irrelevant as it affects the election.
Gerrymandered districts skew "wave" numbers so much as to make them neaningless as regards house results.
Actually, they tend to inflate the "wave" -- if it is a Republican one.
For example, one group that be counted upon to vote 90% Democrat is the blacks. But they are "packed" in districts that are 80% black -- so as to insure the election of black representatives. They may be 13% of the population, but they are a voting majority in only, say, 6-7% of the districts.
As a rule, gerrymandered districts are (intentionally) more heavily skewed to one party than the other. Leaving the "wave" to subsume all those other districts that are generally in the 45-55% voting range.
Roughly speaking 70% of Democrat voters are in 30% of the total districts.