you have a couple of choices here.
if your a pure summoner max revives
if your looking for a easy way to get summons up since u have no attack wat so ever max bone spear.
im not sure with golums ive never maxed one but id go for iron for the throns, fire for the holy fire or clay for the slowing of monsters, one reason ive never maxed a golum is not only does the golum need maxing the mastery also needs maxing and thats a extra 20 skill points where with revives the mastery is already max.
also you should have by now amp and corpse explosion.
also you can max summon resits and get better skeletons and mages.