Alright, but remember that I did not, repeat, did not type or help Nozdormu type any of this. Just Incase.
I am listing 10 soldiers in ranking from weakest to strongest.
Skeletal soldiers are the weakest but highest in number, with sword, shield and other melee weapons are the skeletal warriors often crowding, smothering their opposition. The skeletal mages master minor elemental powers and base their attacks on range.
The undead ghouls are extremely fast, savage soldiers, ruthless and very endurant for being minor. They try to focus on biting their opposition, infecting them with the plague. They strike fast, they strike hard and one single bite might have you infected.
The nerubian soldiers are dangerous, but slow. They shoot web from their mouth to ensnare the opponents and their raw musclepower is high. Their downs are that they are slow and big, making them an easy target, but one nerubian soldier can probably lift five humans. They may also summon small spiders to serve them. Mostly as an annoyance to the opposition.
The necromancers speaks for themselves. Intellectual, powerful and evil. With necromancy and dark magic can even a few bring destruction. To fight these most effectivly, is to fight them quickly. The more time you give them, the harder will they be to defeat. By summoning ghouls, skeleton warriors and skeleton mages makes the necromancers hard to reach, but they also use ranged abilities such as shadow bolts and shadow blasts. Careful with their staff, as one strike might get you crippled due to the immense dark magic that it manifests.
The banshee's are ghosts that use dark magic and loud noises to weaken and destroy their opponents. A banshee screech if at short distance can even crack stone. They are tormented souls and only attackable with non-physical damage. An advice would be to not encounter them in close combat, and instead fight them from a distance with spells.
The abominations! Careful, for now you are encountering dangerous opposition. The abominations are incredibly resistant to all damage, they are about two times the size of a human. They are slow, an easy target and extremely dumb, but careful, for they are extremely strong and sometimes only one blow is required to finish you for good. These things are very difficult to kill, as not even decapitation will finish them. You need to either cut them in half or remove them of arms and legs in order to be certain that you kill them. They function without head.
The gargoyle is a flying soldier whos body is made out of extremely hard material. It is not very strong, but it is fast and endurant. What a gargoyle is most known for, is their agressive behaviour and high speed. However, very fragile when it comes to their heads, as one smash can be all it takes to knock them. But remember, they are fast and flying.
The infernal! Now you've done it! The Lich King sends some of his most powerful soldiers at you. About five times a tall human in length, burning bodies made out of stone, surprising speed considering their size, heavy weight and extreme muscles. They are highly resistant to both physical and elemental damage. They are entirely immune to fire and they bring immense heat wherever they go.
What can be worse than the dangerous infernal? FROST WYRM! A dragon made entirely out of bones and ice. They are huge, loud and they breath ice and snow trough their mouth. One single Frost Wyrm was in former Azeroth capable of taking down a lesser army. Unexplainably enough, despite their body and wings being all bones, they can fly.
To reach these soldiers, The Pitlords, you must really have pissed the Lich King off. These massive Demons take sadistic pleasure from instilling crazed terror, and then slaughtering their enemies. They are about tripple the size of a human and they are half dragon and half demon. Four legs, two arms, two wings (Cant fly) and a powerful tail. They often carry massive cleaving polearms and they use it well with their massive muscles. Good thing that these are almost extinct, because a large number of them would bring a world to its knees. Their former leader, Mannoroth did single-handed destroy armies over the thousands. If your not careful, these agressive and powerful demons can bring the building down. By simply walking do they make the ground quake, they manifest massive dark and fire magic, their roar makes even the braves doubt their chances and they are even more resistant to damage than the Infernals. As an example to their strength, by simply swiping with the tail can these bring down buildings in one try.
Good thing that they are almost extinct, because these are the very best soldiers in Ner'Zhuls army! You must really be a threat if Ner'Zhul decides to risk the extinction of these soldiers. They are the core, the prime warriors, the soul of Ner'Zhuls legion. They are the final line of defense before reaching the top levels in Ner'Zhuls citadel.