DAMDICE

A high number of dice makes for less variance in mobiles hitpoints.
Suggested values are:

       Level      dice       min      min    mean
        1         1d2+0       1        2       2
        2         1d2+1       2        3       3
        3         1d3+2       3        5       4
        5         2d3+2       4        8       6
       10         2d5+5       7       15      11
       15         3d5+8      11       23      17
       20         4d5+10     14       30      22
       30         5d6+15     20       45      33
       50         5d10+25    30       75      53

Mean is the arithmetic mean.  The values in parenthesis are the the
standard merc values.  (Will be put in when there's time to calculate
them...)