Tank to main? GNB/DRK

[Arsthan]

Mechanics, complexity and such things aside, what of their damage and self-sustainability?

DRK's damage is second to PLD's, GNB's the last, behind WAR for now. But there's no big gab between them at all, so "Who's the best damage from the tanks?" is kinda a pointless question imo. Self-sustain is gone, the random potency heals that GNB, DRK and WAR have on their combos are just flat potency; not nearly as good as heals based on the damage dealt like in SB. Defensive wise... GNB is "meh, works good enough I guess", PLD and WAR are power houses imo and good luck with breaking TNB on DRK- because if you don't, you lose a big chunk of your DPS.