CptD,
Just remember that by the time you get your commission, pass IOT, trade training, etc (let alone maybe have to be a 2nd tourist) we won't be in Afghanistan, at least not in any numbers, maybe just a minor training role. The British Army will have shrunk, and the same will probably go for the SH fleet.
Thus, while the MAOT role may well still be one of the better slots for a FOO, it may be a case of spending a lot of time on Salisbury plain and the Brecon Beacons, rather than somewhere sunny and potentially more exciting.
Just a thought. Make of it what you will...
I suggest you take one hurdle at a time, starting with getting a commission. Best of luck!