Just to clarify a few things.
Sir Exxon is correct about summoned Skeleton Warriors. They hit with a +3 enchanted weapon, and to make it even better, it is a two-handed weapon.
The trapped Iron/Admantium Golems beckon... ... [img]graemlins/hehe.gif[/img]
[Unless you got the Improved Golems Mod of course.

]
Greater Mummies require +3 enchanted or better weapons in order in to be hit. They cannot summon Black Blade of Disaster upon will unless you have the Improved Undead Mod.
All Skeleton Warriors( both monster and summoned) are only immuned to unenchanted weapons. Anything that is +1 enchanted or better, can hit them.