I made it so that's possible to find some "good deals", that is targets with low defense and encounter levels, but still good money. You can of course attack any target you want but it's smarter to try to pick the ones with lower difficulty (they will still be difficult, in particular at Nightmare level...).
For example in the image below, the party level is 8, and as you can see there are some good targets to rob:

This kind of tweaks are the one most likely to get unnoticed but that take me most time. I basically spent the whole morning to do this, testing every time and at different party levels
