what are your transition plans? whatever they are practice transitions, you will have no problems as far as fitness goes it seems, so completion should just come, work on speed if you want. Do a few bricks (long bike with a short run immediately after). Consider masters swimming or at least find a pool and work out there. if you are planning on a cold swim get a wetsuit and try using one at least once before the race.

That is my block o' advice.