Irrespective of the "banging about", which at best is a nuisance, but is also likely to give you away if your trying to move quietly, how much of your new additions will you actually use ???, I suspect pretty much none, chemlights have very limited output, most players will object to being cuffed & the shears may harm you in a fall ?............
Unless something is absolutely necessary I don't carry it, can't see the point if its not needed.