Dwarf Units
Long Beards
Long Beards are pretty good and they have a good save.
Hammerers
Hammerers with double handed weapons can take out a third of your opponents army.
Iron Breakers
The best Dwarf troops definetly. If you could have more than one unit of them you could take out your enemy five times.
Miners
The miners are one of my favorites. You can use them to take out monsters and special characters.
Clansmen
If they have spears they're great for defense. I don't useually use them but if you do you can do well if you have a lot.
Crossbowmen
With a range of 30" they can shoot farther than long bows and they have a strength of 4 so the enemies save has -1.
Thunderers
Thunderers give the enemies save a -2 and has a 24" range so you can do a lot of damage with them.
Slayers
Slayers are good because they're cheap, they never run, you can have more than one champion and diffrent types of weapons. A good strategy is to have half of your slayers with two weapons and half with double handed weapons.
Bugman's Rangers
They are great because they can attack and they have missile weapons.