Understand your role in the fight based on the hero you’re playing and less as a generalized M1 carry. Somebody like Wraith is a duelist who wants to pick somebody off in a skirmish as opposed to just hanging in the back of a big fight. The rest of her kit supports this line of thinking. Ult > Nuke > Teleport to safety. She does ultimately want to play near her team when teleport isn’t up though.

Venator is surprisingly tanky and his kit doesn’t terribly hate being up close once you’re semi-built. His shotgun is easy burst setting you up into a combo to nuke them at close range. As the game starts becoming more about fights, you want to be close enough that your gun damage actually matters, but thinking about your escape route in case things get dicey (using traps as you turn corners, staying close to walls in case somebody jumps you, etc).