Just helped someone with Arc last night, and he has another character that needs void. I can run it if you are struggling, but Bungie actually did a pretty good job with matchmaking on this one. I've only seen people put together that are after the same sword. Just make sure you kill you knight first, and kill alakul(SP?) within seconds after. The solar knight is tough, because keeping him alive while you damage the main guy gets annoying. The knight will spew fire all over the place... Use a mic if at all possible so that if you get a random that doesn't understand that you shouldn't shoot the solar knight until the main guy is down to the tiniest sliver of health.