I've noticed in the later gammas there is something skewed with the mixed tension rooms and mixed vaults.

they seem to have much stronger monsters than they should have. I'm talking like a werewolf lord on D8. Things like that. Earlier today i lost a Drakish Farmer with DV 60/ PV 30 in 3 turns to a dark elven priestess on D12 - shouldn't be possible as every other monster on the level was steam rolled.

Either deliberate or something is wonky in the mixed vault generation.