When she is burning Atium, she sees what they are going to do in the extremely near future - next few seconds - while still being able to see what they are doing in the present. And the actions of the visions will change as the situation changes / as the person being looked at changes his or her actions. It's very battle-centric, works-in-real-time sort of ability.
The main problem is duration; she would probably have like a minute tops (which even then is a massive, essentially insurmountable advantage in her universe) at the very most, and would probably have more like 20 - 30 seconds worth.
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"Luxe, calme et volupte." - Charles Baudelaire, The Invitation to the Voyage