Tanking at low levels, especially per lvl 26, can't be a bit tricky. One thing many low level pals forget is that Shield Lob generates increased enmity and there is no shame in using it even when right on top on the mob. Also remember that because Flash uses MP it does not break combos even though it's on GCD. So you can Fast Blade, Flash, Savage Blade to make up in part for not having Rage of Halone yet.

On that note the better deeps are going to realize when it's time to do things like spread dots to other mobs to keep from pulling aggro.