In multiplayer, I had a group of adventurers fight one adventurer, they won, but the game crashed after that, freezing at the victory screen, not allowing me to see loot, details or close the information window.
The starting equipment for the preset characters does not show up when creating a custom character, you may just want to have a default set of stuff for beginning the game except in the hardest difficulties.
For the potions, you may want to quantify either how long the effect lasts or how much health it restores.
When playing a game, returning to the main menu and then hitting multiplayer crashes the game completely.