As a tank I never mark mobs, why because they should be aoe-ed down because its faster that way. It bugs me when people ask me to do this. I do not care what mob you are attacking because its not like I am going to lose hate on any of them and if you are single targeting you are making trash pulls take longer. It's very inefficient to focus 1 mob trash mob down in AK vs aoeing them all.

So please stop asking for me to mark mobs.