overgeeked
Open-World Sandbox
There’s a sidebar about adjusting monster difficulty I remember seeing, but can’t find right now.There are probably ways that you can adjust the difficulty or provide a bit more durability through the advancement. Maybe if your character gets a new heroic ability (or even a skill advancement), you can also increase either HP or MP by 1 point. Provide one additional Heroic Ability of the players' choice at character creation. Provide a bulkier standard array or additional points that the players can allocate as they wish after they roll.
Starting characters with more skills, abilities, and gold would go a long way to ease players into the lethality. Especially the two WP to dodge or parry abilities. The solo adventure has a few abilities that would help. One gives PCs an extra action.