Now the question does RIchmond even want his district diluted?
D+25 to lets say D+18 isn't diluting lul. Nobody needs a 60% AA pop seat except perhaps in Mississippi these days, districts with that level of BVAP were struck down in NC. As long as he can easily survive a primary I assume he will be happy, which probably needs at least say a 10% gap between AA and Whites, which is easily achievable. Whites after all vote between the D and R primaries whereas AA's are solely in the D primary.
Richmond has never been anything even remotely resembling a team player though (in contrast to someone like, say, G.K. Butterfield), so it's hard to say for sure what he'll do.