OK so Normal is 1 job for 1 character for 1 crystal. Random has no dupes except for a chance for berserkers, but characters can wind up with multiple jobs from a single crystal over the place for jobs like 1 red mage, 1 berserker, 1 summoner, and 1 dancer. Hopefully I can swap up or lern 2 reed directions. :fail:
Thanks guys. This has been informative.
I don't blame you for getting confused; it's super simple once you sort it out in your head but yeah.
The basic rules (No Natural Challenge) is "we give you one job at each crystal, and you just have to ensure that you have at least one character in each job at all times (and all characters are always in a job, not in Freelancer) - past that we don't care what you do, mix and match, go nuts."
Normal gives you one job from the jobs given by the Wind crystal when you get there; when you reach water, you get one of those; when you reach fire, one of those; and your last job at Earth is from the Earth Crystal.
Random changes it so that instead of "one wind crystal job, one water crystal job, etc.", you instead get "one wind crystal job first; then at the water crystal one of the wind or water crystal jobs; then at the third crystal you get one of wind/water/fire" etc. It's not 'any' job, just any that would be available to you at that point - new crystal or old - are added to the pool you could draw from. And you can still mix and match them freely, so long as one person is in each class at all times. So technically your example party can't be rolled, but that's because the first job still has to be one of the wind crystal jobs - but the remaining three could easily be water crystal jobs, for instance (eg Knight, Red Mage, Berserker, Summoner is entirely possible).
Team 750/No 750 work like Normal, but cut the amount of possible rolled classes in half, roughly between magic-oriented classes (Team 750) or physical-oriented classes (No 750)
Natural Only is the added restriction that makes it "the character is forever locked to this class, no switching around, characters for whom you haven't gotten their crystal stay Freelancer until you do". It's the closest thing FJF has to a Hard Mode, because while there are times where Freelancers are actally advantageous, past the first act of the game you can't do this anymore and you are ultimately more restricted than a normal player with the same team because you lose the ability to mix and match abilities.
FF1 challenge gives that entire thing the middle finger and goes "here, when you get your first crystal we immediately give all four of your characters a fixed class. No mixing, no nothing, they're in that class forever, and they can be repeats. Also if any were Red Mage, you have to keep them Freelancer until you actually get it since it comes a crystal later."
Also I decided I had to get into the spirit of things, enjoy seeing unfairly attractive pantless berserker bartz for the next two months 
