OK, yesterday I did a list of problematic sites. There's 19 of them, and most of them are rare + unique. Steel ovens and Mount Chining are uncommon, thought. I used the following criteria (thanks to archaeo in the dom3 IrC channel)
alt and const: max 0%
conj and blood: max 20%
others: 30%
Code:
id# name era frq mask lvl type F A W E S D N B gold res sup unr exp lab fort runit1 conj alter evo const ench thau blood
474 Ancient Forge 2 735 1 Earth 1 EPÄTOSI 20%
481 Banefire Forge 2 735 1 Death 1 1 EPÄTOSI 20%
475 Chamber of Changes 2 735 1 Earth 1 EPÄTOSI 20%
477 Conjurer's Cave 2 516 3 Earth 1 EPÄTOSI 30%
482 Crown of Darkness 2 16388 4 Death 3 EPÄTOSI 40%
466 Gorge of Mystery 2 256 2 Astral 1 EPÄTOSI 20%
397 Mount Chaining 1 16607 1 Blood EPÄTOSI 40%
520 Oak of Ages 2 16607 3 Nature EPÄTOSI 50%
637 Pool of Unhealthy Rites 2 223 2 Blood 1 1 20%
395 Summoning Circle 2 223 3 Blood EPÄTOSI 60%
471 Temple of the Turning Tide 2 223 1 Water 1 EPÄTOSI 529 Sea Father 20%
696 The Basalt Forge 2 16640 2 Earth 1 20%
495 The Blood Rock 2 16388 3 Blood EPÄTOSI 30%
401 The Ebony Circle 2 16607 2 Blood 1 3 TOSI 339 Sorcerer 30%
313 The Ultimate Gateway 2 17119 3 Astral EPÄTOSI 50%
173 The Steel Ovens 1 17119 0 Fire 75 EPÄTOSI 20%
455 The Water Solstice 2 16416 2 Astral 4 2 EPÄTOSI 50%
484 Twisting Woods 2 2 1 Nature 1 EPÄTOSI 20%
305 Village of Strange Men 2 223 1 Astral 1 EPÄTOSI 20%
I admit, it's pretty hard to read. But anyone out there is doing such a program, he can pick the names from there.