Unless Igiss plans to altogether scrap the single player campaign (which should be done, but that's my opinion), the Sigma 13-New Berlin JH will never be removed. I'm not sure it can be, anyway. Although I think it might be possible to lock it. Uncertain on that as well, someone said it'd require a player wipe.
In any case, all that is really required is to make another 6-7 equivalent power trading routes that go through all the other houses, including Rheinland/Kusari and the edge worlds etc. Once that is done, sure people will still do the diamond/Niobium route, but there will be plenty of other options also that make the same amount of money in the same amount of time.
Diamonds would require a price increase higher than that on Kyushu in order for people to start shipping them from Dresden to NY, but I don't think that would be a good idea anyway, because that'd be yet another route that "ends" in New York and we have too damn many of those already.
What might improve things slightly on the diamond route is by lowering the buying prices of Niobium on Falklands Base in Tau-37 to about 90 credits a unit and increasing the selling prices of Niobium in Bretonia and on Leipzig Station in Dresden. Lower diamond prices on Vogtland and Bautzen in Dresden (lower on Vogtland than on Bautzen) so people go to Dresden more.
Also lower diamonds on Solarius Station in Omega 11 to even lower than Dresden, which could feasibly get people to pass through Omega 11 and Stuttgart, and lengthening the route that way. I think diamonds should be dropped to about 40 credits a unit on Solarius (the diamond planetary fragment field around the red giant in Omega 11 is supposed to be flooded with diamonds). Diamonds should also be made massively easier to mine in the planetary fragment field around the red giant, but it is dangerous to mine because of the radiation.
Diamonds buying prices could be hiked a little on Manhattan and Houston I guess. At present I believe it's about 890 credits on Houston? Could bump it to about 1,200. Instead of diamonds getting a good selling price on planet manhattan, remove them from there and put the good selling price on planet Pittsburgh and make diamonds sell there for about 1,800 credits. Then lower the cost of buying boron on pittsburgh to about 50 credits a unit (can't quite remember exactly how much it is there), and raise the selling price of boron on LD-14 in Leeds by another 200-300 credits. Then you have a route that goes through rheinland, liberty and bretonia.
Lower the cost of buying MOX on LD-14 quite a bit and people can ship it up to the Outcast on Malta and then ship cardamine out back to the other houses (Cardamine and Artifact prices still needs boosting up everywhere, even in Liberty). Add in more selling points to take MOX to for a good profit. A good idea would be to places in Kusari, so you get smugglers carrying it crossing the war zone, but make it profitable enough for people to risk their necks doing it!
Alternatively, raise the selling price of boron on LD-14 by only 100 credits of what it currently is, and raise the selling price of boron on New London to be only 100 credits or so less than LD-14. Then if you take it to New London, you can ship out Luxury Food to liberty or even to OSC liner Hawaii in Sigma 19 (increase the damn selling profit on Hawaii and Denver dramatically, and raise the prices of buying lux food on Stuttgart also, as thanks to liberty's demands and rheinland economic woes, lux food is massively expensive in rheinland, hence the whole point of the LWB/synth paste problem anyway). Increase the buying prices of Optronics, plutonium and H-Fuel all throughout Bretonia, but especially on Cambridge. That'll get more smugglers going between Bretonia and Kusari. Throw in more good routes from Bretonia to Kusari and you'll get somegood trading going on there.
Anyway, I guess i've written plenty and likely enough it won't even get seen by anyone anyway *shrugs*
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