Do a simple test. Bracket your exposures in normal contrast lighting and develop with FA-1027 diluted 1+14, say 9 minutes.
Print the frames. Pick the one that has shadow detail that you like.
Shoot a roll at the film speed where you get what you like. Before processing, cut the film in thirds, and develop one third of it at a time. Analyze each third before you continue to the next one, by printing.
If you don't get enough contrast you need to develop longer. If you're getting too much contrast, develop shorter.
Now you have a base exposure and base dev time that works well for normal contrast lighting. 1, 2, 3, easy peasy. And you're not relying on somebody else's information either.