Class Homogenization.... Why do you want it?

[peaches]

Well, there will always be some specific jobs groups will require in them (such as Caster Dps for Ifrit for Nails).

While I thought the same, after using the DF for Ifrit and getting three groups in a row with no casters, we only had one group disband right away. We successfully beat Ifrit the other two times, first try. All it took was a little talking beforehand, planning out how we were going to do it. Turns out we had a melee Limit one of them and kill it, whack two more, then use the 2 bar Limit on the last one. It was close, but we got it both times.