Not to be a spoiler, not more flashes/reflectors the merrier, one must understand how light work and controlling it within the minimum. The trend nowadays seem to be using lots of CLS to have better results but most end up.....:thumbsd:.
For me, i will pack 3 flashes, 2 reflector for my normal macro outing, but i only stick to 1 flash all the time, others things will come into play when i can't handle it with one flash or i needed some particular result.
For portrait, i usually only use one flash to fill.