To put this simply can you stay out a fight and just use the dead to do it with out having to run or bring a weapon cause i try but my dead seem to stay there for a min or 2 before attacking also sometimes they run off and come back when the fight is done.

so there great when they work but [censored] otherwise anyone else love the dead but cant seem to get it working due to AI problems.

Well, you have to have a large supply of bodies.

You could at least rely on a little Conjuration like perhaps bound weapons. Or if you have Dawnguard, you could get those spells to summon Boneman or Wrathman.

I prefer the Atronach and Dremora approach, but in essence it's the same.

You'll need a means to bring down a few enemies quickly and quietly before anything else. Poisoned arrow or dagger in the back, preferably. Resurrect before the rest notice you, and sit back in a corner.
If you don't want to bring a weapon, summon one. But a dagger doesn't weigh much anyway.

Also, The Ritual stone.

Yes. Before you resurrect someone take their weapon and then place it back in their corpse. Thus, they won't have to search for a new one.

When you(the player) kills an enemy, for some reason, their weapon gets "disconnected" from their inventory.

This has never happened to me.

The ones that run away are probably weak NPCs to start with. Like the scripted dead bodies that lay about on random encounters.

They need to have the courage to fight to start with. You need to be strategic about your summons. Try to raise them as you are about to enter a situation or area, get the enemies attention and draw aggro, then your minion will charge in.

Using your surroundings is imperative to success. Achieve the high ground and raise them until the last one is standing.

Could be the manner in which you kill them. I often use magic, so perhaps the force of my destruction spells knocks the weapons out of their hands?

Whatever it may be, I am familiar with what the op is describing. You can see this for yourself when searching a corpse you have just slain. If you check the corpse's inventory and its weapon is still "equipped" then you are good to go. If you check the inventory and its weapon is not equipped it will search for it when resurrected. Taking it and then re-placing it in its inventory should solve the problem.

That is a possibility. However, I have killed enemies and their bodies fall down the side of a cliff. with their weapon still laying at my feet. You are able to loot their body from the weapon. So, their body is still connected to the equipped weapon even if they are far away from it.

However, I still manually equip them just to be sure. Well... sometimes. As the dropped weapon will "snap" into their hands as the come to full rise.

Yeah, I'm not sure what causes them to sometimes "drop" their weapon. But it does happen, usually when the player does the killing blow. I think performing finishing moves or death from falling damage will keep the victim's weapon equipped 100% of the time I've noticed. Though when I kill them with destruction spells and sometimes arrows, their weapon becomes unequipped on death.

I have just tested dead trall with a blades sword and a bandit. He didnt have the weapon equiped after killing him. I dragged the body away from the weapon, but after raising him again his weapon magically apeared on his hip instantly.

Where can one find those spells?

I have never seen this happen before. Even when the body and the weapon fall away from each other, once the reanimation is complete, the weapon "teleports", or as another poster said, "snaps" back to them, equipping.

As far as necromancers go, I believe even a "pure" necromancer would still utilize offensive spells. http://www.youtube.com/watch?v=xHrlXE2PhBE showcases a build that utilizes frost spells from Destruction. Trying to think back to any necromancer I've ever played in any previous RPG's, necros often utilize poison or "absorb" health spells. Unless it's a specific build you want to play, not using any offensive spells or weapons, a pure necromancer can very easily use some Destruction spells. If you wanted to use pure Conjuration though, it's gonna be a very tricky play through.

It doesn't matter if the corpse is several miles from the weapon. It could still be "equipped". By equipped I am referring to game mechanics and coding. If you check their inventory, you can see if the weapon is actually equipped, even if the weapon is visually detached from the body. Hence what you described.

Sometimes the weapon is "unequipped" on death in which in their corpse's inventory the weapon is there but "unequipped" thus causing the corpse to look for it upon resurrection.

He had it in his inventory when dead but the arrow to show equiped wasnt there.

Well then I guess it's a glitch to happen to some? I've personally encountered this on both the Xbox 360 and the PC. And it sounds exactly like what the op is describing.

You can find those spells in the soul cairn.I think they make the perfect summons to round out a necromancer.

The Wrathman inparticular is a very good summons that will often come with a dragonbone weapon.