A good mic with higher input gain would increase the signal to noise ratio, not decrease it.
I'm not gonna hurl invective and call you a hack or anything. However, it's "raze" a city. King's Landing was razed, not raised.
If it had been a constant 2.8 with a 13x zoom, it would've been the size of an RPG launcher, and the price of an Alexa.
FWIW, Josh, the lead in this film, just wrapped an Inaritu film starring Leo Dicaprio. So I don't think we can fairly consider him a "non-actor."