Info about vanilla special effects used to modify enemy stats.
These are generally applied per-area, but there are exceptions.

Special Effect General Areas Max HP Mult Damage Mult Flat Defense Mult Stamina Damage Mult Resistances Mult
7000 Cemetary of Ash 1 1 1 1 1
7010 High Wall of Lothric 1.116 1.113 1.013 1.021 1.009
7020 Undead Settlement 1.266 1.257 1.026 1.031 1.019
7030 Road of Sacrifices 1.55 1.345 1.039 1.052 1.029
7040 Cathedral of the Deep 1.6 1.426 1.053 1.119 1.038
7045 Farron Keep 1.866 1.569 1.066 1.141 1.048
7060 Catacombs of Carthus 2.133 1.687 1.079 1.141 1.058
7070 Smouldering Lake 2.716 2.046 1.119 1.211 1.087
7080 Irithyll of the Boreal Valley 2.616 1.822 1.093 1.162 1.067
7090 Irithyll Dungeon / Profaned Capital 2.683 1.953 1.106 1.189 1.077
7092 Anor Londo 3.1 2.16 1.133 1.211 1.097
7093 Lothric Castle 3.683 2.261 1.172 1.317 1.126
7095 Consumed King's Garden 3.433 2.202 1.146 1.263 1.106
7120 Archdragon Peak 4.466 2.367 1.2 1.34 1.145
7130 Untended Graves 3.416 2.236 1.159 1.285 1.116
7135 Grand Archives 4.4 2.308 1.186 1.317 1.135
7140 Kiln of the First Flame 4.516 2.282 1.2 1.34 1.147
7150 Painted World of Ariandel 4.466 2.367 1.2 1.34 1.145
7160 Dreg Heap 5.25 2.489 1.23 1.44 1.273
7170 The Ringed City 5.417 2.544 1.25 1.47 1.336