Race/Job combinations? Taru will always be the "best" mages because of their racial emphasis on MP, MND, and INT, and Mithra will always be the "best" THFs, RNGs etc. because of their high AGI and DEX values, but it doesn't matter much and no one really cares anymore. Galka WHMs, Mithra BRDs, all sorts of "inferior" combinations are very acceptable, these days, and any minor differences in the racial stuff can be easily accounted for with good gear and merit points.
EDIT - Last night's accomplishements. 44.5 COR --> 47 COR, and helped Leyviur kill the two NMs for the SAM quest (which he has now unlocked, I believe)!
actually im pretty sure mithra and taru are tied for the worst mind. plus from my time with whm and blu i always felt +mp was worthless unless you are zerging since once things get going you will rarely get back to full mp or completely exhaust your mp. then again im an elvaan female so i may be downplaying mp. meh i should get a new sig since when i had it made i was planning to level puppetmaster to 75 wich i promptly retired at 23 =o