10 perception is just too big, even at seven with the sniper cap I can see tiny figures in the distance that I can barely aim for. Charisma does boost follower's stats, and boone's spotter perk is great for identifying long distance, night, or hidden targets. ED-E's perception range is insane, maybe it also affects draw distance?
Maybe ditch entomologist and get the magazine perk. A +20 skill boost can go a long way towards skill checks, and you get +1 skill from skill books. It also lets you max your lockpick and science at 80 and still be able to open very hard challenges.