Ata, I feel like I must make a confession to you: I have no idea what I'm doing in this combat. I thought that I would be able to learn the 4e system as I went along, but it's just not "clicking" for me. I hate to leave you and the other characters in the lurch like this, but I think that I would be a lot happier if I just withdrew from the game before I do something stupid and get one of more of Sharm's friends hurt or killed. I'm open to suggestions, but the way things stand right now, I think it would be best for everyone if I withdrew. I'll stick to the 4e "kiddie pool" until I learn what I'm doing.
I don't think it's going to be as big of deal as you think. Sharm is a pretty simple character tactically speaking - his Battlerager power is more complicated than normal bookkeeping wise though. And some stuff obviously is clicking - you caught onto using our APs right away.
Some of the stuff is the same as it was before - help the rogue and yourself via flanking for instance. Focus fire is also good, so try to coordinate with our other characters. So is spreading out to avoid area stuff.
Most of your attack powers are single target stuff - you're main concern is who to beat up. In this case, one big monster (the Goristro) has run foward and put a big bull's eye on itself. As long as you attack and mark it, you won't be too far wrong. That'll make it harder for that guy to move around and attack other people. Your Crushing Surge at will, or any of your encounter attack powers are going to be passable choices right now. Cleave is not so good, since no one else is within reach. The Goristro is a pretty tough enemy. You have Combat Advantage because its blind so you have some extra attack bonus.
I think Sharm could also charge past the Goristro. However, Annalist is also likely to throw some kind of area attack in that direction. And Kozaar is better at that sort of thing, while his powers are a little lacking against just one tough guy.
If there's some specific action that we need you to take, I think someone will mention it.
You'll probably learn quite a bit if you're willling to give it a shot.
Plus its not like it's the end of the world if you screw up - you're not ruining the climatic fight of a campaign that's been running for years. The game says Combat Playtest at the top of this thread - it's supposed to be a learning experience. Not having played this character for very long, I'm not exactly attached either. Sure, I'd prefer to win. But all told, I think these characters are sort of disposable.