That can be easily realized based on how the tank is marking. Are they marking just the one target? If so, then it's probably a tank who's thinking about those scenarios.
I do this, and sounds like Nadirah does as well.
If, however, you have... a BLM/SMN or SMN/DRG, etc... basically anything except NIN/NIN, MNK/NIN or MNK/MNK (and even these are debatable... I guess it'd be based on how the first couple pulls go), then you should not be marking every target in the group. Just any that are important to kill.
IF the dps are not already killing the important ones first.
But I agree, not ALL tanks think like this. And the good ones stand out, cause they'll look at the group and pull based on the group. Marking if they feel it's necessary to point out something, but otherwise... they're just gonna make the run go fast.
