Expedition: general discussions.

I tried to make it original...

...but it's not original at all. Perhaps you could take inspiration from expansions for Heroes. There are plenty of games with a similar approach to generation, but the skills are implemented differently than in yours.

When I was coming up with concepts for my expedition a long time ago, I aimed to balance hybrid classes with the others, because they almost always end up at the bottom in expeditions (and not just in them!).

I also tried to make hybrids more or less useful in my game. This, by the way, was one of the reasons why I introduced cooldowns instead of mana.