Quote Originally Posted by RiceisNice View Post
It being impossible is not the problem, it's mechanics that interfere with a typical composition of 2 melees (which can get really extensive with player-targetted, and instead all you'll really get is a healer that is incredibly gimmicky), or healer exclusive mechanics such as searing winds that prevent you from healing anyone if you were limited to melee heals (or again, bottle neck you to a healer with incredibly gimmicky skills). At that point, encounters would have to be designed with that in mind and we're already limited on encounter mechanics as it is.
I wonder if this line of thought wasn't one of the reasons which created the MCH/BRD copy paste issue.

We are limited only by the resources, development decisions and creativity. Both mechanics and jobs can be adjusted.