I'm having big success using Ancestral Pickaxe on a Runelord. Give Thunderers an extra Rend (for -2), teleport, and unload on whatever looks scary (which I have rr1 To Hit against because of Grudge). Because I didn't Run or Charge, Thunderers get to Shield Wall. Pair it with my Fyreslayer Tunnel for actual support and it works pretty well.
I'm not saying I like having a mono-build army. But, I do at least already have all the models for it.
The Runesmiter & Magmadroth combo is only 320, and a Knight-Azyros is only 80. So it fits into 2000. I might give that a go, soon. I like the idea of the Magmadroth not being anywhere near the rest of my army (because it deals MWs to everything around it, including friendly units), if I could somehow mitigate the sucky parts of the Magmadroth, that'd leave only the good parts... Right?
EDIT; Addendum
...After getting schooled, the Organ Gun is actually so much better it's not even funny.