Red mage coming

[Neophyte]

If RDM is a DPS, that means SAM will be a tank.

No, it means that the other one should be a STR (dps) class.

VIT (tank): DRK, WAR, PLD
MND (heal): AST, WHM, SCH
INT (dps): BLM, SMN, RDM
DEX (dps): BRD, MCH, NIN
STR (dps): DRG, MNK, ???

3 tanks, 3 caster, 3 healer, 2 ranged phys, 2 melee phys... so it doesn't matter if it's ranged or melee, but since it should be STR I suppose a melee dps job.