It's a lot of unnecessary, time-consimung back-and-forth that could be easily done in a program like Sketch.
Every approach is unique to its designer, and it's situation. But I have yet to (personally) find Photoshop (or a hybrid approach) more effective and time-saving when you deal with a large project. Artboards are MUCH easier to keep track of and group, and with something like Mirror [1] you will save hours in exporting/slicing/sharing over the course of a project.
Photoshop was not made for UI design. It can do it, but it will rarely be the best tool because Adobe is not catering features for that niche.