My last battle scene was less than a paragraph; admittedly, there were only 4 people involved in it. (3 against 1, but the one was wearing armour and had MUCH more skill.) The point wasn't really to describe a battle for the sake of it, but to illustrate just how fracking dangerous the singleton was. It also helps that the description was from an onlooker, who also had the luxury of viewing slowed-down CCTV footage afterwards.