So what, she can pass through matter, breaking it down? Do her powers work like Kitty's where she has no reliance on air etc.? Can she pass through forces of nature such as fire?
Opening a portal for battle field removal would probably the Crew's best option as I don't recall them ever hitting someone intangible if that's how her powers really work.
She's like a destructive Kitty, but I think there's a bit more resistance when going through stuff (that Demon's hand didn't *hurt* her but it looked like she was pushed back a bit). She's described as 'swimming' through ground, for example.
I haven't seen energy attacks go through her, so I'd think Fire'd be able to heat her up and such.
So she doesn't really become intangible. Matter just gets broken down when it goes through her. What's the most durable object she's broken down? I'm not going to assume she can break down the Wrecker's crowbar for example.
Why not? They start off a field like .5k away in battle.