Dwarves are my main army and I own literally all the Pre-hobbit dwarves (and Thorin's company).
Dwarf Rangers use Dwarf Long Bows (DLB's) that only have a strength of 2 just so you know.
For 600 points I'd get some Khazad Guard, Dwarf Warriors, Rangers, Dwarves of Erebor and a few Dwarf Heroes (Murin & Drar are a must!). Here's an example list
War-band 1
Balin w/Durin's Axe
3x Khazad Guard
4x Dwarf Rangers w/DLB's
5x Dwarf Warriors w/Shield
Points :203
War-band 2
Murin & Drar
7x Dwarf Warriors w/shield
4x Dwarf Warriors w/Dwarf Bow
Points :299
War-Band 3
Dwarf Capt w/shield
3x Dwarf Warrior w/2h-axe
Points : 92
Army Total: 594 points
26 Warriors
4 Heroes
11 Might!
It's a pretty good force, you can always swap out a few units here and there but a few Khazad Guard go a LONG way (they can use the 2h-axe or the normal so they are versitile). You also get a mix of longer ranged weaker bows and closer ranged stronger ones led by Drar who is the only Dwarf who may fire twice in a turn (w a bow, I know Ori can w his sling shot). And of course you have a good sized block of troops with shields and a few more 2h-axe men to bulk out the force.
I'd also recommend Vault Wardens (they are ridiculous at 9 Def!) and a few Iron Guard. Dwalin is also a very capable Dwarf hero, and for larger a battles the King's Champion is as good as it gets. Just look at how cheap he is considering he comes w two banner bearers...
That's my quick advice. Good luck w your Dwarves
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