Ive solo'd a Lvl 24 Strike. And even waste a good portion of the time killing respawning enemies due to a public event which happened at the time (My two teammates left me at the very start). And killed every enemy inbetween me and the boss while also killing the boss spawns first. (On the Cabal Command Strike). Yet only had 1 Legendary appear. (To me is completely random as i had a Legendary occur from a chest just before maintenance that i wasnt able to swap yet) Which was a Hunter Cape. And in the end run. I only had 2 rewards (neither of them were Engrams). While in a 3 man team (normally takes 20-30 mins) i get 4 rewards over half the time (with 2 being engrams). So i say, we go at the pace we like. If you dont like it. Go make a fireteam with guys who think the same as you. I'll clear the enemies in the way, but if ill still go at the speed i play at. If someone is lagging behind, ill wait for them at checkpoints. Or at the boss. Its not like the amount of kills affects the rewards in the end. And if i ever lag behind. I dont expect to be waited upon.