I know - there's a post like this every few days, but I thought I'd post this to get a definitive answer. I don't know how to make a poll so I'll just count votes in the responses.
A simple question:
After you max Raise Skeleton, Skeleton Mastery and Corpse Explosion, which is the 4th skill you should max to make the most effective skellymancer?
Let's assume that you make your skellymancer mainly for MF, in areas such as WSK and The Pit.
a) Skeletal Mages
b) Dim Vision
c) Bone Armor synergies
d) Golem Mastery (to get an Iron Golem)
e) Other (please state)
Over time I have made all these variants and I have a preference, but I don't want to lead others' opinions (for now).