Now days no tank can tank, not normal attacks, not TP attacks, not spells, its almost always just AoE spam, and a tank holding hate or not, wont stop the death of everyone else.
A tank isn't "tanking" if other people are getting hit / killed by rapid fire aoes. That's why I mentioned severely restricting their range to 5~7 feet centered on tank or conal. It allows for strategy and positioning (stand near tank and die) while not requiring your DD's only be Aegis PLDs.

A tank also isn't "tanking" if DD's have to back down their damage potential, that is an artifact of FFXI's broken hate system. People really need to go play other MMOs for a bit and see how sane developers went about solving that balance issue.