Group agro is tough for us monks. I found the new combat changes and things like dragon stance made it a bit easier. Here are my tips for being MT in group encounters. Make note, the people I run with are familiar with how I/we run groups, what their job is, and how I MT.
To start we make sure people use a /assist valentar macro, so they stay on my first targette mob, and move along from there.
I have up dragon stance, defensive stance, Wo% buff, and sparking hands ready to go.
1. I target the desired first mob such as named, healer/caster or heroic in the group. Run up pull using aoe taunt, run back, hit the main target with single taunt, then my aoe attack(if safe). I then might through up the FOTM line buff if needed, which build more agro for me (buffs=agro) By this time I recon I have good agro on it, the rest of the group, and my group should have /assist setup already.
2. I tab to next target, use two attacks, move to next target use two attacks, rince repeat. Whenever my taunts refresh I just hit them on what ever my current target is.
3. My gold is to hold agro, nothing else in this situation. If we are running a group, and attacking group encounters, my job is not dps, it's anything but holding agro. And with group encounters that's a full time job for a monk. I think I do a pretty decent job of it in these situations.
I have done a lot of running with a swashy ramping up their dps so I have practice in holding agro, or trying. 
In my experience as long as I don't have mage or scout more then 5 levels above me I can hold group agro pretty decent. I usually have enough agro built up should something peel, I can usually get it back in a few seconds.
Hope this helps.