True, being a warlock gives you that ability. On a level 24 strike, players shouldn't really have to use those tactics; but if they're a low level trying to play 24, then they have to do that to survive. I just disagree that trolling people during a boss battle is a very sporting thing to do. If you're level 26, especially Phogoth, you can take on solo if you have to. Nightfall and Heroic Strikes on lvl 28 require some sort of coordinated team hiding.