i'll read the topic you linked later ruke, ignore the following question if it's already answered:
does your spreadsheet calculate for different mobs by % fought of total:
5 pops mob A
3 pops mob B
3 pops mob C
8 pops mob D
X = total
then 5/X damage with values for mob A, 3/X damage with values for mob B... etc.
A and B can be the difference between skoffins and mmj blm, or 81/83 colibri and so on.
naturally there's a slight challenge to determining the proportion of a level at which a given mob will pop at - but we're already beyond the point where the time invested would have a return in reducing hours meritting personally.
i vote the topic is renamed Excel Saga
