Went into Shattered Halls for the first time last night with another guild group that needed a little damage done, so they took me along.  2 fire mages, warrior tank, holy pally for heals, all well geared except me (mostly green plate).  Omen threat meter, so I was able to watch closely the aggro of the tank.
Here's my question since I'm new to pretty much everything I did last night.....
I was unable to match DPS with the mages, but came in right behind them for damage because I kept having to back away or risk pulling aggro from the tank.  I was using Sanctity Aura, with Seal of Command, crusader strike, judge routine that works very well.  Should I  be using a different aura to decrease my threat with Holy damage or something so I don't pull aggro from our tank?  Or what?
I went into this with a little fear that I wouldn't be able to hold my own with so well geared group, but I actually did dang fine (as I thought I would) and was commended for it.

Hoda
Madoran
Knights of NorthRend GM

A problem you may run into with running with a "geared" group is the warrior will have problems getting rage. If your pulling agro then your doing your job. I pull agro when I decide to go all out and pop all CD's/trinkets. I also have beat mages/ loks/ and rogues on DPS. It is not always the gear. You may just be playing it correctly. Also make sure you put salv on yourself if you dont have another pally. -30 threat = more damage you can do.

I'll try salvation aura instead.  I was just a little greedy and wanted to to as much damage as possible with sanctity, so I kept that up instead.  Thanks for the advice, hard to get constructive here at time.  Very much appreciated!

I assume you also have the talent that gives you reduced threat as well?  I don't remember the name of it now but it is pretty deep in the ret talent tree.

If you do and are still pulling aggro, try using blessing of salvation.  You can also use both of your bubbles to clear aggro completely.