I do not support the overabundance of focus on dps tanks have.
But I agree with dragonseth07.
Your reply is irrelevant for not only the guy in question is off-tanking which means he's most likely not taking more damage than any other player in the party. But even if this wasn't the case, the poster asked about overall DPS which is a purely mathematical question.
Which is why your answer is really off-topic.
