Here's the map I would draw; I went for 4-2 D.
Like the current 1st, very Republican. Safe for Scalise or his R successor.
To unpack Democratic votes, this seat goes from majority-black to majority-coalition. White VAP is up to 49.3% with blacks at 39.3%. The one problem here is that, while a white Democrat would fare best in the general election, the Democratic electorate is heavily black.
I could see a black Democrat being elected, but his appeal would be fairly limited to New Orleans, as the electorate in the other parishes would be quite hostile.
I actually drew this seat for a Chris John comeback. John was popular in the during his time in Congress and he's only 51. While the trend here is strongly Republican both Obama performance and the Democratic average are up 3% in the new 3rd, compared to the old 7th. Jeff Landry retains his New Iberia base, but Boustany would have more territory. A John-Boustany-Landry jungle primary would be the best scenario.
This district, not the 1st, is actually the most Republican seat in the state. It was pretty much the leftover district after I drew the other 5. It would actually be open.
Alexander and Flemming would be thrown into a jungle primary here; maybe one of them could run in the super-safe 4th instead. This district includes Shreveport plus the liberal parts of Monroe, both of which a Dixiecrat could use as bases. Its under 55% McCain and only narrowly Republican at the state level, so its certainly within reach of a Dixiecrat.
Flemming's 2008 opponent, Paul Carmouche, fell only 350 votes short in a district that McCain won 59/40; certainly a 54/45 McCain seat could be winnable for him.
Still, like CD3, the trend here is aggressively Republican.
This is Louisiana's Cajun version of a Texas 'fajita strip' district. Besides the 2nd, this would be the other safely Democratic seat; actually voting for Obama and its comfortably Democratic at the state level. Its actually white majority (52-42). Louisiana State Senator-elect Rick Ward III, one of the more conservative Democrats, would be a good candidate here.