The diamonds to tokyo/kyushu and then niobium to the ring isn't very viable anymore because it's got like 20 pirates who frequent that area.
So far I've had 3 pirates of differing factions all waiting for me to leave new berlin, 3 pirates of differing factions waiting on the other side of the Sigma-13 hole, gunboat pirates who kill me before I can say "Stop shooting me" (they'll literally fly up and blow me up? What the...)
I've moved on to other trade routes, but damn... it's very jarring to see groups of pirates of differing allegiences all just sat there waiting for joe trader. What's worse is the fact that there are more pirates than there are traders, all of which demand (without doing it RP style. They justgo...) "2 million" to me and start shooting up my shields.