I haul H-fuel and Plutonium as an export always. I import our cheap labour, gate part, and deuterium primarily now after having done 19 full cargo loads of every import GMG bases buy (should round it to 20 but I like prime numbers)
the new update has pretty much screwed all my routes that i just managed to learn only last week.
*sigh...
now i'm going through FLComp like mad trying to find new ones, will post when i see a good one.
edit: to OP, by the way, if you take mining machinery from Frankfurt to Munich Raubling then take copper back to Nuremberg you get a nicer profit from frankfurt to munich.
As for me, I'm not sure if they nerfed it yet, but I do Human organs from freeport XV to Gran Canaria and Deuterium back. Moderate profit, generally safe.