HF Comms during sunrise & sunset?

[Massey1Bravo]

Are there any 'rules of thumb' when selecting a HF comms frequency in eastbound and westbound flights during sunrise and sunset? I know it's related to the reduced MUF during the night but how do you choose which frequencies to use to communicate ahead and behind?

e.g. An a/c is flying westbound during sunset, which HF frequencies would be most suitable for communicating ahead and behind?
13261,8867,5643,3467

Thanks in advance!