My personal thought is to use ABRP first, like you mention, to initially plan the trip. My though is that you then, when you are at a charging station, to use ABRP to see what the next likely charger should be, with it using current conditions to help give you a better guide for the expected range; as well as a guide as to how much charge is needed. You can also decide if you want to select a different charger (while still having a good idea of how conditions and altitude changes will affect the range). At that point, use your preferred navigation app to get you to the next charger.ABRP is good too for initial high level planning, but when it comes time to actually drive the route, I don't find it as useful. But yes, there's 4-5 apps that are really must-haves. EA, Plugshare, ABRP, ChargePoint, maybe EVgo if in a region where there's many of those, and any other charger network apps. Frankly, I'm not even using FordPass for anything to do with charging, other than checking the car battery status.
If wanting the EA Pass+ discount, that's needed anyway. I just find the EA-only map a good starting point, because it's usually easiest, fastest, most consistent and dependable with the least research. Then I drill down into the other options with Plugshare, which are a lot trickier and varied.