It is a fine line you tread between strengthening your reputation as a specialist in only one area and getting the word out of your other competencies and experience. What you bring up is a very common issue. It is excellent that you are addressing it and seeking solutions. I know attorneys who insist on listing just about every single area of law on their bios. This doesn't work well, either.
People realize, when they see the same name in many areas that they are looking at a generalist.
That isn't necessarily a terrible thing, it depends largely on ones market. For your particular areas, each requiring extensive specific knowledge, I'd try to limit it to 3. If you occasionally work on other stuff, great, but I would highlight it too much. Then have a separate bio for each of the 3 practice areas you mentioned. Oh, and ask your fellow attorneys to avoid introducing you in such a way as to exclude your other business.