Owning Alone...

So I can't really figure out why I own all over the place when I play alone, but when I am in a group, I slack off a little.

Its established that I pay more attention to my surrounding than Joe does. However, he can out DPS me any day. Keep in mind this is all on the same toon, Alaenia. For example... all the fights leading up to Lord Marrowgar in The Spire. As far as going around and finding webbed and bone spiked guys, I can find them super quick with no macro. The DPS though, because I'm more focused on making sure the webbed are broken free or the spiked people are down in time before the fire hits them. I'm also the one that knows where the fire is going when he whirlwinds. Its a fun fight for me as hunter. I really enjoy it. I've watched the Devourer of Souls... yeah... its annoying and to me... doesn't look fun considering Joe is always dead.
Anyway... I ran Dirty out to Northrend many times before as a lvl 64-66. Each time, I'd over aggro crap here and there, but make it out alive without using lay on/of hands or divine shield. Top that... I'm under-geared. Joe always sits behind me and is like "You're gonna die, Fish." And I'm all like "..........what? Sorry, wasn't listening." And he is all like, "Never mind, looks like you got it under control." Um... of course I have it under control. I'm a pally. Pally is over-easy and by far the first close range class I have enjoyed other than druid. Always used to killing at a distance. Oh well. But yeah, I really need to learn how to get more involved with groups... seriously...