Mustrum_Ridcully
Hero
I would double on Striker first, too. But not because I believe it's more powerful, but only because it would be "faster".
Basically, the overall damage a party inflicts is equal to "damage x staying power". If you add a Controller, Leader or Defender, you will add to the staying power part. The Controller makes the enemies less able to deal damage, prolonging your staying power. T he Defender makes it harder for the enemy to deal damage, too, and he has more staying power to begin with. The Leader often adds to the staying power due to his healing abilities (but he might also add to the damage, depending on builds). The Striker always adds to damage.
But: The length of combat is roughly determined by enemy staying power / party damage.
Until someone has actually run the various possible party composition, I do not believe that any role focus impacts the viability. It is possible though, in which case we have to conclude that the available implementations between roles are "imbalanced". Maybe most Strikers deal too much damage, or most Leaders heal too little or don't grant enough bonuses.
Basically, the overall damage a party inflicts is equal to "damage x staying power". If you add a Controller, Leader or Defender, you will add to the staying power part. The Controller makes the enemies less able to deal damage, prolonging your staying power. T he Defender makes it harder for the enemy to deal damage, too, and he has more staying power to begin with. The Leader often adds to the staying power due to his healing abilities (but he might also add to the damage, depending on builds). The Striker always adds to damage.
But: The length of combat is roughly determined by enemy staying power / party damage.
Until someone has actually run the various possible party composition, I do not believe that any role focus impacts the viability. It is possible though, in which case we have to conclude that the available implementations between roles are "imbalanced". Maybe most Strikers deal too much damage, or most Leaders heal too little or don't grant enough bonuses.