Kirimu coat looks nice.

I used some dresses for a bit for the whole girl gunner thing. Bonus points for mch not randomly doing flips like every other physical dps and ruining it.

Right now though I'm using the uldah grand company coat. Makes you look like the etrian odyssey gunner, looks nice besides and is actually appropriate for the cold ishgard weather. And the grand company coats are so old that nobody actually wears them so it's a relatively unique look.