Nice plant!
Can't see too much to worry about this late in flowering, just keep doing what you have been doing and everything should be just fine and giving any extra supplements this late in flowering will not really have much time to work, nor will there be any new growth, so why add extras when you are so close to flushing and harvesting?
I wouldn't expect a 200 watt light would cause too many problems for your plant, but 9 inches may be limiting the coverage area a bit, then again, the plant looks killer, so not much to worry about on this front either.
Hope this helps,........ Organoman.