Even if my main is an SM, I'm not the best one to answer because I'm a casual player. However, this is what I've been doing that helps me be a mix to blend in most groups.
Briseadh is set on Path of Hoeth which is more of a defense spec. I'm going to try a more offensive tactic with my baby SM when I have time to mess with her.
I find it good to have both a good two hander and a sword and shield combo. This way you can switch to the style that works best for what you are doing and what you party needs. For a recent example, I went on a tombs run with some of the crew here. I was the off-tank, so for the first three it worked fine for me swinging my two hander. However, stars being quite a different set up and we tried it with me on one of the brides, I went sword and shield for a more defensive tactic. This worked well, only thing our crew needs to brush up on now is getting them to move at the right time and not too far. ::chuckles::
The stats I find that help is a combo of strength and wounds, maybe a little toughness thrown in. Strength is obvious, but the wounds helps you live alonger. Initiative is another thing to work on lowering for the high level dungeons. You want it high enough so that if you main tank and get buffed right you are at 3% or lower. I'm still working on this, but liniments help. I also got it lowered further making sure that is the main thing I'm through my points from RvR into.
Of course, I goof off in this game enough to be a jack of many trades and master of known. It's been great playing with this crew and learning things throughout the game.