Like has been said focus on carries and offer raid services with a good cheat. A good cheat should absolutely have an always updated flea market item price database (we update every hour to be sure) and if your buyers are looking for specific items for example for completing quests or upgrading the hideout your cheat should include a custom item filter.
You're also absolutely going to need loot through walls to reach the loot behind locked doors, it also helps to know exactly where the most valuable loot and that's why we also include a list with the most expensive items and the bearing to get to them as soon as possible.
In short, the cheat you use for RMT / services is going to make the biggest difference, but demand for these services might be lowered now since there's going to be a game wipe soon, make sure you get the best cheat possible.