Tank DPS is the least of your issues.

[Mattiux]

try to get it through your tiny little brain .

First of all, you have to calm down.
Take a big breath before every answer.

Then, while if the whole party sucks the Tanks dps is irrilevant, in case of progress (No, not only First world kill) in my experience and in my static clear every bit of dps helped a lot. Yeah, even tanks and Scholar's one. Sometimes to push a phase further or to kill a trash add faster.

Obv you have to judge the enviroment. If in MY party, with MY healer the tanking part is safe then i can help with more dps. The goal of the whole thing is doing the best,pushing dps while the aggro/mitigation management is going on.