Tank DPS is the least of your issues.

[Kuwagami]

I don't see whats so hard to understand honestly it has NOTHING repeat NOTHING to do with how good ANY of the tanks DPS is PLD could be numero uno beating every DRG to top DPS slot for all my point cares.

If your tanks can do 600 dps rather than 300, that's 600 group dps your healers/dps won't have to grind if you miss them. Not sure why you would recommend anyone to do less dps than they can do.