I was the VC player. If I remember correctly we didn't regen crumbling wounds. I think maybe I regained a wound in the magic phase from the VC lore attribute. Or maybe I was in range of the BSB at that point, so suffered one less wound due to crumbling from that. I lost plenty of rounds of combat with the Varghulf and also the Crypt Horrors, so it seems unlikely that I'd forget and try to regenerate a single rounds worth of crumbling, but not at any other time.
For the terrorgheist scream, to me the best you can say is that its not 100% clear either way. Hopefully GW will get around to updating their FAQs soon as thats not the only unclear rule in the VC book.
Anyway, good report tarrym. If you want my post battle thoughts, then basically I think I just need to be more cautious when charging headlong into tomb guard with a king. If I'd have held back, you would have been forced to come to me, then if I'd been clever you'd have been in range of the bane stone and not me. I also think it was a mistake giving you the side of the table with the arcane ruins, as those extra channeling attempts made a huge difference to the magic phase.