Which Tank is Better Off MT?

[Msugi]

WAR/PLD - PLD MTs
WAR/DRK - DRK MTs
PLD/DRK - highly dependant on whether the fight is magic damage or physical damage, though generally PLD MTs
WAR/WAR - either can, though probably the better geared MTs because it is safer for them to stance dance.

So basically if I queued as PLD then I should expect to MT, OT as WAR, and as DRK I may have the option depends on my tanking partner right? Thanks a lot, that just confirmed my doubt!

[Lambdafish]

So basically if I queued as PLD then I should expect to MT, OT as WAR, and as DRK I may have the option depends on my tanking partner right? Thanks a lot, that just confirmed my doubt!

Pretty much yeah, though as Rongway pointed out these are optimizations, and if that doesn't happen and your WAR partner wants to go MT in DF, then they can.