I think that as long as you read Rough Beasts of Empire
and Zero Sum Game
, and maybe Paths of Disharmony
, prior to Plagues of Night/Raise the Dawn
, you'll be okay. Otherwise there's not a lot of cross-referencing among the TP books, so the specific reading order is pretty flexible.
As a rule, publication order is usually the safest route in terms of getting the proper story flow.