Helldritch
Hero
I would keep the HD or healing recovered on a long rest at one and not one per tier.
Players of level 6-10 would recover 2HD/long rest. It would take from 3 to 6 days to recover all HD. Why bother with the extended rest of one week?
Players of level 11-15 would recover 3HD/long rest. It would take from 4 to 5 days to recover all HD. Again why bother with the extended rest? At this point, greater restoration is readily available...
At level 16-20 and 4HD/long rest It would take 4 to 5 days to recover all HD. Again, why bother with the extended rest?
Keep it at one HD worth of healing recovered.
As for the DC of the save on a long rest.
I would go for something like that: DC 10 + level of exhaustion. If you like critical, add that a 1 adds one level of exhaustion and a 20 removes 2.
I would allow proficiency bonus on that. Just a small boost to our hand to hand combattants.
Players of level 6-10 would recover 2HD/long rest. It would take from 3 to 6 days to recover all HD. Why bother with the extended rest of one week?
Players of level 11-15 would recover 3HD/long rest. It would take from 4 to 5 days to recover all HD. Again why bother with the extended rest? At this point, greater restoration is readily available...
At level 16-20 and 4HD/long rest It would take 4 to 5 days to recover all HD. Again, why bother with the extended rest?
Keep it at one HD worth of healing recovered.
As for the DC of the save on a long rest.
I would go for something like that: DC 10 + level of exhaustion. If you like critical, add that a 1 adds one level of exhaustion and a 20 removes 2.
I would allow proficiency bonus on that. Just a small boost to our hand to hand combattants.