After playing the game for some time now, I've come to the conclusion that a lot of the classes/job's have the potential to accomplish combat roles they currently do not have the ability to select in duty finder. For example, Arcanist/summoner's using the topaz carbuncle or the titan-egi summon have the ability to tank entire dungeons with little-to-no trouble and yet the only the only role that is available to them is damage. Another example would be the healer class/job roles have the ability to produce substantial damage if built correctly. I think it would be very cool to see offense oriented White Mages and Scholars "tearing" through dungeons.