These are just my speculations about future secondary jobs. I had gradients going but the darker colors took precedent and it conveyed the wrong ideas. Basically, I was thinking Samurai could be a DD that could off tank very well. Knight would have tank status, but be able to deal pretty good damage with counter attacks. Also, as I mentioned before, this was an old image. I also had Chemist going into 2 un-named classes that would throw vials. (One Debuff and one Healer) This could maybe start the DoH requirements making it get extra skills for having a higher Alchemist if people really want to go that route.
EDIT: I used the wrong image. I had fixed this, but the requirement for Black Mage is Archer. XD
In my mind the Dark Knight was intended to be more of a caster. I was thinking they could cast magic with their free hand. Meh. lol
That's because I made the Dark Knight very similar to Red Mages. xD
Why is it such a bad idea? It didn't work in FFXI I know, but if the skills were used masterfully, it was a pretty darn good tank. I think a good evasion tank could really switch up the game play. Require less healers as his whole goal is to not take damage at all. Coming from Pugilist it could get Second wind to restore any damage it DOES take. In theory you could not need a healer at all in pre endgame dungeons with a ninja tank.
I could actually see Dancer being a Buff role (if buff and debuff became roles) rather than healer.