If you are finding mid-end game getting tech points to be a real grind, a great source is to go to the north wilderness sanctuary 3 and loot the chests there. So how do you make that farmable when the game doesnt have any nearby fast travel points? Set up a pal base on the back side rocks of the sactuary! More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.