Well with dot timer I see my party's buffs and hots. I never have to look at my healer. So if my druid puts a hot on one of my dps I can see it and it's duration.

Edit: I see this information on my main. Which is normally my pally or DK. Also like everyone is saying Pitbull is also good for this. You can change the size of the buffs and hots that you receive. to make them bigger or smaller (as needed) and even highlight buffs and hots that aren't your own.

Like on my toons. My pitbull is set to highlight my buffs with a green border. and make them smaller than any buffs or hots that aren't my own casting. So if anyone else casts a hot on me it is larger than my icons for my buffs.