Just making that clear. While it doesn't need too much buffing overall, it could use some buffs and some skills need reworking like Dark Mind and Dark Passenger still. I think it could use some more DPS overall, too, so that it's a bit more DPS than PLD for the tradeoff of less utility and defenses.

My fantasy of the three tanks is this:
PLD: Super defensive and lots of utility, brings least DPS to trade off for this. Excels in prog, not as necessary in farm.
DRK: Perfect mix and balance between offenses and defenses. Trades some defenses and utility that PLD brings for more offense and DPS gains. Excels as MT in farm parties, or as OT in prog parties.
WAR: Super offensive with minimal defenses and utility. Trades lots of defenses and utility for much more DPS gains. Excels as OT in farm parties, not so great in prog.

Of course, I want every tank to be perfectly viable as MT or OT in all prog or farm parties.