I still don't get why people argue about these things still.

SMN: Melee for TP to MP or backline for resting MP.
COR: Melee for TP or backline shooting for TP.
SAM: Relic Great Katana for melee, or relic Bow for ranged.

It is simply a pick whatever fits the situation kind of thing. You don't have to pretend only one way is the valid way and anything else is done by gimps.