[Rotting]

Properly fitted BDU with a duty belt to attach pouches would probably suffice and not look like a sac of potatoes, I'd think anyway.

I've seen a few people with just a duty belt tri-pouch droplegs and they're a shit-ton more mobile than a lot of the players I've seen. Also looks comfy since you're not horribly restrained by a vest or rig, but still have a good amount of capacity so you're not restricted for resources. I'd also assume that due to bust size, a vest isn't comfortable. I wouldn't want to imagine having more pressure then needed on the chest while in-game since sometimes it can be hard enough trying to breathe with less gear on (I'm also a smoker though).

If I didn't carry 15 fucking mags on me and two rifles, I'd probably opt for a duty belt with droplegs though, since you're not restricted any longer in terms of mobility on the upper half. Your legs wouldn't suffer much from droplegs, since they aren't horrifyingly restrictive, and even when they are, they aren't too bad. Used to run just with a belt and two drop leg panels with my old SiG setup, and being a thin build, it greatly increased mobility. Also considering females generally have less muscle mass, having a massive weight reduction from gear is probably a massive relief, since I've seen a lot of males with their setup sweating and huffing like pigs at the end of the day. Unless she's a tankette, it'd probably be brutal.

If she opted for the corset though, you could always invest in a semi-tight longsleeve shirt with a high neck line (Pretty much right below the chin) and/or wear a light neckguard. Wouldn't have to suffer the consequences of a close range bleeder on bare skin, and her neck would be protected.