I'd say Samurai, Geomancer, Dancer and some hybrid form of Red/Rune. Although I'm surprised Geomancer wasn't added already. However, Tactics and either the second or third FF titles might be a better selection to look at for possible or most likely job that could be added in some form or another.
It has in some past and side titles. I think it was in one of the tactics series you could unlock a dual wield trait and attach it to a Samurai. Then equip a second katana to put it on full offence. I'm almost certain FF2 (or was it FF3, Its the one where a character can equip two shields) could do this also but I haven't played it long enough to see if samurai was in it.
