Last time i played with scout melee with elder sword and gave fireteam good match without using any long ranged, not sure what is an issue here. Took 3 down, let them reinforce and only 2 escaped with chooper. I dont like doing stuff too easy, using plasma caster, pistol or bow feels sometimes overdoing, have to give fireteam some changed for them to enjoy match. And i am ft main. Used disclipined perk and when close of fireteam, cloacked, vision Off, trying not to run too much to give position running, they can hear your footsteps if they have headphones. I used to use lot of leaping too, but its way more fun to run to cover than leap over enemy and try shoot back.
For this type of game play you need to think more and use less brutal approach, scan targets, kill seperate mission runners first, and you need to have good understanding where every soldier is, how fast they can come to shoot you if you take one down etc etc.