I've wanted to try an army, with this particular rune in mind. I figured, I could probably go with just the ring of thori on a runesmith, but I wanted to see if it could impact, throwing more breath attacks into the same fight. So, I went a bit character heavy, to incorporate this.

Dwarf Lord(General)

Shieldbearers
Shield
RoFirex2
RoParrying
RoFortitude

Thane

BSB
Shield
MRoGrungni

Runesmith

RoSpellbreaking
Fiery Ring of Thori
RoStone
RotFurnace
Shield

Thane

RoFirex2
MRoGromril

Thane

RoFirex2
MRoSwiftness
shield

32 Warriors (8x4)

Shield
FC

25 Longbeards

Shield
FC
RoStoicism

10 Miners

Champion
Steam Drill

Cannon

RoForging

Gyrocopter

Flame cannon

Roforging
RoBurning

5 Rangers

15 Irondrakes

FC
Trollhammer Torpedo
RoSlownessx2

Ahh, this is going to be sooooo bad.....But gonna be worth it, just to see my opponents face, if I manage to get in with all 8D6!!

All characters, except the BSB, goes with the Warriors.
I also wanted to see, regarding destroying enemy artillery and monsters, if a group of Miners could do the job, together with a single cannon. Should the cannon fail, I also have the Trollhammer.
I didnt have much room for chaff, so wanted to find out, if a group of Rangers would be able to survive long enough to redirect, or if its better to just take a second gyro instead. I actually might be tempted, to drop the flame cannon altogether, in order to get more chaff. Perhaps two additional Gyrocopters or one Gyro and more Rangers.
Irondrakes instead of the Organ Gun, hence the flame Thrower.
I'll have everyone inside the Grungni bubble
Irondrakes on one flank, stubborn Longbeards on the other. Warriors acting as anvil.