Thermoptic Camo
As we’ve mentioned before, Sombra is both a bit squishy and in need of proximity to really take advantage of her weapons and abilities. Thankfully, the tech savvy heroine (or villainess?) has a cloaking ability called Thermoptic Camo, which you can see her use in the “Infiltration” short. It renders her invisible for a few seconds, allowing her to sneak by enemies and flank them to either deliver a full burst with her Machine Pistol, or to put one of her abilities to use.
One thing to keep in mind, though, is that you aren’t invincible, so don’t just pop it to run into crazy situations. It’s best used as part of a coordinated effort with one or more of your teammates. You can pop up and serve as a distraction for a buddy to take out a target, or use it to find a weak point in enemy defenses, the choice is yours.