For the Midwinters weapons i rewatched severed dreams and managed to get some shots of the midwinters weapons., every weapon pulse in the shots comes from the midwinter(clarkstown), hope these help.
Edit, i think these are the 4 forward main guns firing, as thats were they seem to be coming from. other than that i would guess that the rest of the weapons would be similiar to the Hyperion, except with beam turrets. I'd say the main ship to take a bit of artistic license on would be the nova, as i don't think that ship has ever been seen firing its weapons, apart from the beam error(or those could have been weapons bought from the narn) on the In the beginning film.
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