I was with a SMN in DF in arboretum when it was fresh. Now I'm a good BLM and I play to my fullest every run, because I take pride in it. Anyways. After the first few pulls I started realizing everything was dying super slow. Talking a few minutes for 3 mins. Healer was dpsing. I started watching the SMN, who was in up to date gear. He was throwing down shadow flare, then ruin spamming. Using deathflare when he could. No dots at all. So I politely asked him why he wasn't using any dots, and he said because it's pointless because they die too fast. I reminded him these pulls were taking 3-4 minutes and that his dots were most of his dmg. I got the snarky, "Don't tell me how to play my job." I preceded to kick. Sorry, but you're wasting everyone's time because you're too stubborn to learn.