Hello Zelytow,
This is a really cool question that I just also ran into. I have some solution. Which is similar to the once discussed below but there are a few things I would like to add.
Indeed there are 254 different classes and 100 teams max. This is far from all possible combinations as this allows us to create 8 different boolean values. But we are in luck. as most properties from a class and team can be set through verse like health, shield, overshield and (in)vulnerability. Only movement speed, and flying as far as I know together with.
Where to find those functions?
In: Fortnite.com/Characters/fort-character you can see some of the functions regarding this like:
fort_character.SetVulnerability(<true/false>)
or
fort_character.Damage(<0-10000>)
or
fort_character.Heal(<0-10000>)
etc
For movement speed we can use stat_powerup_devices with unlimited length (Or just so high that it’s practically unlimited. You can even say that this power up can be replenished)
Now for the other scenario’s like energy (stamina) and flight:
What I would do is make all odd classes fly classes, and all even classes not. Then we have 127 fly and 127 non fly classes. So we can set 127 stamina regenmodifiers. But as it is from 0 - 100 we only need 101 of them.
In this way you can make everything customizable as you want. You can even go a step further and disable all building mechanics and implement your own using teleportation (or when Scene Graphs go into beta using Scene Graphs). If you need any further help or need more ideas just tag me or send me a dm.