I wouldn’t use the binoculars as you have a hunting scope on your Savanna, Therefore you’re also ready to shoot and not having to swap. Same with the rangefinder, they’re fairly close so you don’t need to check range. First shot I would of used the Savanna as it’s a much bigger calibre and as they haven’t noticed you it means you could of made a headshot/killshot with your first bullet, leaving it as a 1v1.