So I'm about to play some replication right? Match found, yadda yadda. Then I realize my team comms are down, the chat room is disconnected, and the agents have that nightmarish unloaded model, then when the match starts, I stay in that vs...

Pre aim(keyboard pre aim ,using A and D to line up crosshair) pre aim with mouse hug the wall blablabla... can someone explain me when and WHY to use a specific type of crosshair placement/ aiming style? ​ cause for example som...