So I duo'd the Esseles yesterday with my guild leader. I was a level 11 Vanguard, he was a level 10 jedi Sentinel. Yet despite me being specced as a tank, I was taking hits like a little girl, and he was tanking most of the elite droids without so much of a sweat. Is there something I'm doing wrong that I should be doing? Or should I not worry for now, until I get more tanking abilities?