I'm doing exactly that, but on mobs of Golds of 5 or more it simply is not enough. I've woven Force Grip and Taunt and Ravage in my rotation and all my threat abilities while constantly tab targeting, but it's NOT keeping aggro on me in large groups.
I'm fine in smaller groups, that's okay. But large groups just.. destroy me ability to control the battlefield in any real viable fashion. I can control three golds by myself with no CC from the group, but when there are six of them total, that's not nearly enough.
But you see, at that point, I've got the attention of three, but ALL my Lots-Of-Threat-Causing CDs are down and some won't be up for thirty seconds or so. In the mean time, two of the mobs (Golds) that I haven't been able to taunt/scream/slash enough to hold aggro on turn and start ****** our healer.
If there are additional silvers (and there often are), it gets even worse.
This is all assuming that my group isn't *********** ********, and has at least one fairly sustainable/lengthy CC.
You may be having fantastic luck or something. But a lot of us are doing exactly what you're saying, and our experiences are not the same.
Please do not presume that just because you're not having as hard a time as others, that obviously everyone else is just 'doing it wrong'.
That's incredibly arrogant.