Final Changes Power Rankings:
Rankings____OPA_____DPA____NW/A____MPNW____%Max
Elf_________74.69____40.22___179.71____0.64____83.06%
Faery______67.21____36.19___154.17____0.67____87.13%
Human_____72.51____39.04___164.68____0.68____87.99%
Avian______75.13____40.45___163.29____0.71____91.95%
Dwarf______77.46____41.71___167.99____0.71____92.15%
Orc________78.29____42.16___166.82____0.72____93.79%
Undead_____82.83____44.6____171.89____0.74____96.30%
Halfling_____82.82____44.6____165.52____0.77___100.00%
Only Orc is directly changed from the Prelim values - it's science penalty is dropped to -15%. The other values have moved slightly because I didn't run the TG/Forts optimizer last time, and used 20% TG, 10% forts on all races. (UD picks up .04% from this.)
RE: halfer vs. UD
Zauper, I've found the two big pieces of the puzzle that were missing. First, your lower pes/a assumption adds about 1% to UD's strength. Secondly, I assume TW is in use - removing it lowers halfer by about 2%. [Edit - er, UD has it too, so that doesn't explain the HA vs. UD gap, though it helps with the rest.]
Combine all this with your use of OPA/DPA against my use of OPNW and DPNW, and we get two distinctly different outcomes. Whose assumptions are most realistic (and for which players?) is a question we are unlikely to resolve.
All that said - in many ways, I take your calculation as a *confirmation* of my general methodology. While we disagree on which race is strongest, we both have halfer and UD within about 4% of each other. I think we'd both be comfortable saying someone wishing to play attacker should be fine with either race in most kingdoms (aka, my just above 200th kingdom). While I think neither of us would claim faery works naturally as an attacker. (Not that I don't play stupid stuff like that sometimes... but I don't recommend it to others unless they know quite well what they are getting into.) Of course, a lot of the fun is picking and defending a "best" race - but in the end it is a theoretical argument to most players when they get to actual race selection.