A 2h mace damage range as shown in AH is 1405-1944.
The weapon has
+284 min damage +361 max damage 49% damage increase
and no other stats.
The Doomhammer damage range is approximately 655-720 per Blizzard's web site.
I assume the correct approach is to multiply the damage range by 1.49 giving 976-1073, and then I add the min and max damage, giving a final range of 1260-1434.
That's nowhere near the listed damage range. What am I doing wrong?
Solving for what the actual damage range of the mace would have been, I get 752-1062, for an effective +97 min +342 max hidden bonus. Sadly, that hidden bonus doesn't match any known tier min/max table I've been able to find.
(I care because I'm writing an accurate random weapon generator.)