This right here. I usually run a really high agility and constantly harass the line with gunfire and grenades. When people are staying bunched and intellegently taking and giving damage this becomes less effective. I then tank up more so I can act like a wrecking ball and punch some holes. I die doing this but my team can pick apart the leftovers. That is why Trials is so different than crucible and why I prefer solar grenades over bolts. I only use bolts in Trials because I'm usually too fast to take a lot of damage or too heavy to correct an over committed mistake. My only other choices are direct hit grenades for the most part. So I can soften targets or get people to stop engaging me with bolts.