This is a pretty challenging map. You have to deal with a lot of Armored and Regular Thugs who can quickly surround you if you stay put for too long. 1st Medal There will be a thug coming into perfect position on the far side of the platform as he walks by the ladder. Plant the Proximity Bomb right at 13 seconds to lure the armored thug to climb up the ladder. If you plant it too soon, you will instead lure the thermal thug. Detonate it just before it stands upright on top. If you are late, he will be knocked to the side instead of back down the ladder and you wont get the medal. So you need to time this really well. 2nd Medal As soon as you knock down the thug, the other guys will immediately turn around to his position and it will be a perfect time to send the fire extinguisher to the unarmored group of two guys. Try not to land on the guy as I did here. You are required to do a silent takedown in the extinguisher smoke to get the medal. You only have enough time to take out one thug in the extinguisher smoke before it clears, so dont get greedy and get back on a vantage point and get rid of as many unarmored thugs with the remote batclaw. 3rd Medal While you are doing the remote claw takedowns, look for opportunities to plant a proximity bomb near another thug. You need to plant it quite close to him for it to work. You need to work fast to take out the remaining thugs one by one before they group together, which will make your life pretty tough. The fastest way to take out an armored thug is to batclaw, walk forward to tip him over and ground pound.