4.2.3: Extreme out of depth unique. Hmm

[Ugramoth]

Yeah, tried the same tactic on 9-9 level, I though I was OK with fire immunity and TO.
"The Phoenix breathes light. You die."

[Selkie]

Originally Posted by Ugramoth

Yeah, tried the same tactic on 9-9 level, I though I was OK with fire immunity and TO.
"The Phoenix breathes light. You die."

Sounds like another reason in the long list of "I should always play as a high elf"

[backwardsEric]

There isn't a strong difference between 4.2.1 and 4.2.3 for the number of deadly monsters (more than 10 levels out-of-depth) reported by the statistics debugging command (these numbers are for 1000 clearing simulations each; then summing the reported numbers for blocks of 5 levels):

             Number of deadly monsters per block of 5 levels
Level     4.2.1 all  4.2.1 only uniques  4.2.3 all  4.2.3 only uniques
 1- 5     0.016      0.000               0.020      0.000
 6-10     0.305      0.000               0.273      0.000
11-15     0.339      0.000               0.217      0.000
16-20     0.211      0.003               0.170      0.003
21-25     0.603      0.042               0.382      0.018
26-30     0.716      0.071               0.490      0.040
31-35     1.126      0.192               1.028      0.150
36-40     1.325      0.282               1.120      0.253
41-45     1.009      0.351               0.862      0.274
46-50     1.115      0.420               1.149      0.460
51-55     1.352      0.548               1.320      0.524
56-60     1.316      0.557               1.470      0.671
61-65     1.379      0.798               1.408      0.752
66-70     0.957      0.677               0.988      0.669

There were changes to the tunneling in 4.2.3 so the vaults with doors or other small entrances on their edges (like the "Cross" lesser vault in this screen shot or the "Cracks of Doom" greater vault in this screen shot) are more likely to be connected to the rest of the dungeon. That would make it easier for the residents of those vaults to get out once they wake up.