I plan to run a Roll20 one-shot Naheulbeuk game with players who may have very unbalanced characters, some of them way more powerful than others. Of course, it may lead to some problems, but my main concern here is with their reward at the end of the quest if they succeed, since they will be using these characters in other GMs' games afterwards.
It will probably be a mix of gold coins (reward from the NPC who asked for their help) and loot objects got on the adventure. In any case, how can I make sure to not give overpowered items or treasure to the weakest character but still give substantial reward to the strongest? They will likely split any amount of gold in even parts between them, and try to share fairly between them items they will find by looting corpses and places they will encounter.
They will all use their characters with other game masters after my game, so I have be careful about not overpowering them.