Mr Khan said:
I haven't done any of the actual predator challenges, it was specific runs in-story. The basement of Wander Tower, both times (first with inmates, second with TYGER guards), the top of Wander Tower with Strange, the nest of snipers before Joker, the guys outside Poison Ivy's place as Catwoman, both times against Joker's guys in the steel-mill. |
Maybe you're just a bit impatient? These predator portions of the game can be pretty time consuming, planning your strategies, setting up explosives in the terrain. Two major things though are to stay in detective mode, and quickly zip line to a gargoyle/building as soon as you take someone out. Another thing too is to drop near an enemy when he's alone and sneak up behind him and do a silent take down, or just do a knock down (You can gluide to an enemy and kick them before you land and go straight for a take down).