Go inside the bank by blasting this wall on the roof. To reach this area, follow the waypoint leading to a guarded rooftop, you can simply sneak by without taking out anyone from above this rooftop, just locate it and bombs away. Always take out the guards one by one. You have to isolate them so you will not get frustrated trying to deal with multiple guys especially the ones wielding firearms. Use the explosive gels on walls to provide misdirection, after the explosion quickly move to another area and ambush the incoming enemy as you prefer to. Use your jammer at the start and disarm as many enemies as you can first while being perched above, then focus on the other guys who still have dangerous firearms first. Also use the multiple batarangs for multiple knockdowns leading to multiple knockouts. Head inside afterwards.
Go inside, then crack the code from the scanner device and enter the bank. To solve the code, rotate the left and right sticks until the turning stops and provides you some letters. Detonate the explosive gel through the floor on the far end. Head inside afterwards.
Beat the jammer thug first, then proceed as usual once your bat radar is clear off some jamming. This is a predator room so take out everyone separately and isolate each one first. Interrogate the final thug afterwards. Always take out the guards one by one. You have to isolate them so you will not get frustrated trying to deal with multiple guys especially the ones wielding firearms. Use the explosive gels on walls to provide misdirection, after the explosion quickly move to another area and ambush the incoming enemy as you prefer to. Use your jammer at the start and disarm as many enemies as you can first while being perched above, then focus on the other guys who still have dangerous firearms first. Also use the multiple batarangs for multiple knockdowns leading to multiple knockouts.