Use distraction to move individuals out of a group and finish them off with a silent stealth kill or arrow headshot. Crouched movement and scramble maneuvers between environmental concealment allow you to get close to enemies. Use this to your advantage and pick them off one or two at a time. Enemies are typically spread out and initially unaware of your presence. Most encounters in Shadow of the Tomb Raider allow for a stealth approach. Note that if you plan to play on the highest difficulty, Deadly Obsession, all three must be set to Very Hard. If gunfights give you trouble, set Combat one setting below the others-likewise if environment traversal or the challenging puzzles are your weakness. The average of these settings gives you the final setting of Smart and Resourceful, Rite of Passage, or One with the Jungle.
Shadow of the Tomb Raider allows you to choose a different difficulty for Combat, Exploration, and Puzzles.