[CQ-Contest] Best prefixes and suffixes

[John Geiger]

I have enjoyed the responses so far about a callsign being too short, and what might be optimal.  Here is another question related to this topic

If you were trying to build a callsign that would get through when your signal is marginal, which of the following prefixes do you think would be best:  KW or NA?  And which suffix would be best: KW, NA or AN?  I am really only interested in responses to those prefixes and suffixes.

Any thoughts will be appreciated.

John AA5JG