I'm leveling my thorn right now. The range perk came in handy when I played a SP strike. I was sniping mobs and knights off the ceiling from the other side with good accuracy and damage. At that range you have to pause between shots to line up crits anyway. If your playing more CQ then that perk is probably not your first choice. Some guns have a perk set that makes it tactical for different scenarios. Some just have random perks where only one is the logical choice. I personally like the perk set on Thorn.