what always enters my my mind, and one of you guys can explain, is how do you know?
sure it's pretty easy to tell if dps is generically slow by how many times a boss's mechanics loop or if you're hitting an enrage timer, but how do you know which dps is at fault and at which point in their rotation they are going wrong?

I personally don;t have a keen eye and I'm concentrating on what I'm doing rather than watching what other people are doing.

is it just watching the debuffs/buffs that appear in the party window? I generally keep my mouth shut but often just wanna bark "how about you worry about your own rotation that worrying about theirs" when i see this happening

that said, if you are going to give advice always explain why something should be done different. generally will go down a lot better.