Isn’t there some inverse square math rule about radiation like this? The further away you are the radiation reaching you is far less than it would seem? Not good at remembering this math so maybe someone can correct me.
Even if you could get the mirrors all focused accurately and tracking the object at speed it seems like it wouldn’t be any more of a concern than a really bright searchlight or something.
There is the matter of space debris, which is already a problem. If you're going to attack satellites to disable them you want to capture them in a decaying orbit.
My brain has been poisoned too thoroughly by New Vegas for me to make any vaguely reasonable comment. W should make Archimedes and melt putin into a puddle.