How many only main one job?

[Jim_Berry]

I main NIN overall, but would meddle with PLD/DRK as an alternative. When looking for a raid group, I have no issues being PLD/DRK main in that group while still using NIN for everything else.

*EDIT*
Lately, I've been on DRK more than PLD. Only thing that kills from playing DRK over PLD full time is Sephiroth Ex. Basically, if I'm MT'ing as DRK against Sephirot, and we're not at the 65% mark by the time none of my three defensive CDs are up (Foresight, Shadowskin, Shadow Wall), I usually die during or right after the 4th tank buster in Phase 1. As PLD, I have Foresight, Rampart, Sentinel, Sheltron, and Bulwark to survive the 4th Tank Buster and beyond.

I tried to look up text-based strats for phase 1 for DRK on Sephirot but haven't found anything outside of guides simply saying to pop a CD each time. So, if anyone knows a text-based guide for phase 1 tank busters for DRK on what to do for the 4th tank buster, please link me to it.