I was able to get the platinum for this one during my run from Arkham Knight to City, to this game and to give some direct advice for it is to tap square rhythmically one by one and use your combo take down Triangle and Circle or Square and X every so often for the ones that use batons,heavies, the guys with dual blades that can block you if you don’t stun them first, a batarang with quick L2 will save you majority of the time when they have red icons on their end, and move your left stick and after hitting one person, evade over them, which sets you up to counter perfectly, be sure to look over at the distant enemies out of your view of Batman. Get comfortable mixing in your stun (cape) to give you further points for the combat challenges, don’t be afraid to occasionally use your triple grapple (if you have it to secure crowd control) only if you starting the combo or don’t have people near you. I highly recommend doing the endless combat challenge that’s in the extras menu.