This is straight forward, just level up Laurie in the blood web until you have 3 perk slots, equip all 3 of her perks (Sole Survivor, Decisive Strike, and Object of Obsession)
The most difficult part of this is adapting to the play style object of obsession requires, take quick looks at the killer and if you think they saw your aura move somewhere else so they don't find you. You can also use it to determine what direction is safe to go, and to distract the killer from a hook so your teammates can save them. Combined with sole survivor, as more people die/escape it is more difficult for the killer to see you so if you're the only one left don't be scared to always keep the killer in your sights so you can avoid them.