Aging Bard
Canaith
As an ancient 1e DM, I use a method with is generous by 1e standards but quite risky by 5e standards. There is always some uncertainty, but the tails can be cut off to reduce variance.
1) You roll for each HD; 2) At 1st level, the minimum roll must be 4 or the HD average rounded up, whichever is highest;
3) Each roll may either be (player choice) a normal die or an averaging die: d6 is 2,3,3,4,4,5, d8 is 3,3,4,4,5,5,6,6, etc.
A dN averaging die is exactly equal to the rounded up average of a normal dN die and its rounded up average (N+1)/2. Elegant!
1) You roll for each HD; 2) At 1st level, the minimum roll must be 4 or the HD average rounded up, whichever is highest;
3) Each roll may either be (player choice) a normal die or an averaging die: d6 is 2,3,3,4,4,5, d8 is 3,3,4,4,5,5,6,6, etc.
A dN averaging die is exactly equal to the rounded up average of a normal dN die and its rounded up average (N+1)/2. Elegant!