Because his mobility was limited, Nagato had to rely on the Six Paths of Pain to fight and keep the Akatsuki running.
Although the Akatsuki's members were all quite capable, there were still many matters that only the Six Paths of Pain could resolve.
That made the Six Paths of Pain indispensable to the Akatsuki.
Especially now that the plan the Akatsuki had spent years preparing was about to begin, Nagato had to finish creating the Six Paths of Pain as quickly as possible.
There would not have been such a rush originally, but Shihōin Naraku had destroyed all of the Six Paths of Pain.
If only one or two puppets had been lost, it would have been fine. But losing them all was unacceptable.
For one thing, none of the Akatsuki's members were easy to handle. Without overwhelming strength to keep them in line, some might start getting other ideas.
In fact, strength reigned supreme within the Akatsuki itself.
Without strength, one did not even count for anything.
Of course, Konan was still there, and her abilities were enough to deal with some of the Akatsuki's members.
But the Akatsuki still had its own plan to carry out, and those matters were beyond what Konan could handle, so the Six Paths of Pain had to be completed.
As for "Madara Uchiha," the Mysterious Masked Man, Nagato and Konan had never trusted him in the first place. How could they possibly leave the Akatsuki's affairs to him?
So ever since his battle with Shihōin Naraku ended and Nagato led the Akatsuki's members back to Amegakure, he had been busy creating the Six Paths of Pain.
Before he could get to work on that, however, the exposure of his true identity had caused a few problems.
Hidan, Deidara, and others had