Uhm no. Even back before people outgeared Ifrit HM, it was never required to have a BLM/SMN LB the nails. People just find it easier/less prone to error and made up the requirements just like the "omg no PLD tanks, rage quit". Melee can LB3 one nail, killing it, while the other DPS take down 2 getting the LB back to 2 bars, LB the last nail while the other DPS take it down.
