First - let me answer based on the focal range being as per full frame so 50mm is 50mm.
You need - fast prime and a good wide angle.
You need the prime, for low light and bokeh. Yeah - I know these days you can easily add bokeh in post, but as a 50mm prime is thhe cheapest prime you can get and usually gives you a 1.8 apperturre - so why not? You can get "near-macro"-like shots; portrait-like shots and you can avoid flash in all but the darkest environments.
You might choose the zoom primarily for the wide angle... Why? Because most that the tele of the zoom gives you is resolution, otherwise you can always crop (Yes, yes, I know foreshortening and exposure effects, but comeon - you know I'm right - you only really need the tele for sports and animals).
So if your camera has a hi rez sensor - you might get away with a prime 50 and a prime 24 (or their APC equivalents)...
But as I always say - to quote the great Weegee, "F8 and be there" - so just bring your kit zoom and "be there", instead of fussing with lenses.
Just my opinion, but it's been a long time since I was a shooter.