If you're not positive you know the rules really well, run your itin through the validator software or the human validation machines that hang around here. It'll save extra trips through the two-week circuit.

Or if one of the other OW airlines has an office or GSA there (or you can find a TA in a country that's no more expensive than Finland) do business with them instead.

Also, if you plan to spread your trip over a long period and will probably re-route yourself somewhere along the way, at first have them issue only the segments you're sure about (plus some dummy ones to make it a complete trip.) 16 segments or less will get you a machine-printed ticket (is that true on Finnair?), their thanks, and will save you paying taxes and fees for segments that you'll eventually change.

(Iit 's not clear that money for changed segment fees ever gets credited. I think they're supposed to, but the fees data that's preserved with the ticket (they've never heard of computers) is often too cryptic for them to understand, so they just don't bother. What can the pax do? He doesn't understand it either.)

(Emeco in Cairo is "almost" a choice, except Egypt is USD250 more expensive for an AONE5. They ticket on AA stock, and you might save enough in fuel charges to make up the $250, but I doubt it. Blands in Gib was very responsive when Harry was there, and will end up with the Finnish price, but I don't know how knowledgeable harry's replacement is. Also they'll use BA, not a cheap or speedy choice.)