I also concur that the pattern you have in mind will work fine. The alterations you need to do are very easy. Just make sure that the base pattern (without the sleeves) actually fits you properly before you bother with the style alterations.
I don't agree with some of the construction suggestions given, though. Why use fabric glue to attach bias tape when you can sew it like everything else?
You will want to interface that cut-out on the chest to make sure it doesn't ripple or flex too much.
FF9 cosplay? Hit me up!
I now have a Tumblr
. Sometimes I use it.