Dilvar is an amazing tank whether people like to admit it or not. He really does develope and apply strategies to each boss he tanks. When i first started trying to tank, I just thought you taunted, warcried, and bashed when available. Dil taught me that there was alot more to it than that. He would take the time to walk me through each step and the theories behind why you pull to certain spots or bash, shield wall at certain times. However, in addition to all of that, his greatest benifit is the ability to command others and get everyone on the same page before and even while tanking. That is something I had always said about him even when I was in Arma.
As greek said though, there have been some very competent tanks come and go in epona. Tuna, PK, dimee, and many others. Howver, in my opinion, Dil is the bar everyone tries to reach.
But professionals are not arrogant and brag about how good they are. If he grows out of that someday im sure he will have mastered the art of being professional about anything, nobody likes a sore winner.