As a RDM main, except rare cases like someone bothering to explain strats to others, i usually command like this :

1 : did the tank mass pull and was i able to dps all i want without him losing the aggro ? If yes he get my commandation, otherwise go to 2.

2 : did i use Vercure on me too much because the healer can't heal properly ? If no he get my commandation, otherwise go to 3.

3 : did the other dps seems like he was hitting stuff and did he not die too often because of his own mistakes ? If yes he get my commandation, otherwise nobody get it while i quickly flee out of what was probably a "omg please get me out of here" run XD

So in the end if you are a dps, i am not sure that you want a commandation from me, because it requires to have a bad time dealing with non-reliables tank and healer.