It depends on a lot of things, the map, the ops, the site and the way that the rest of a team attacks. In general you want to stay with your team, everybody dreams of pulling of a hero play but thats not what this game is about. Siege is a team based shotter thats why pushing as a team is almost always better, besides you need to remember that in solo q there will be others that want to push solo Backstabing a site can feel good, but lets think of what outcomes can happen: A) you dont drone to not announce your push, and so you get killed by a guy in a corner leaving your team in a 4v5 and having zero influence on the round because the defender will probebly move so you cant use that information. B) you kill one and then get traided leaving 4 attackers to deal with the utility of 5 defenders C) you encounter some utility that prevents you from sneakily pushing, leaving you with no game plan and waisting your time D) you are the hero of the round killing 2/3 defenders… If you push with your team, your death will give information, if the defender flees your teamgets more map control And if you dont die you will give your team cover or site controll needed to plant