U need the killer 7 and the sniper semi auto is fine u dont need a better scope u need the striker shotgun and some indicenary gernades (the red ones) u need at least ten they have spikes when u fight the u need to equip the killer 7 magnum and shoot them in the chest or the head with the magnum and/or u can blast them in the chest with the striker shotgun they will fall to the ground and equip the indicenary gernade and throw it and if this is done correctly they will fall and leave pestas.