The Medicinal Plant Gatherer and Ling Long were both separated from his body, so their reliability was naturally not a concern. Both of them, like the Watchman, had spent four thousand years in the Bitter Garden. These were genuine years of experience, not merely inherited memories, so there was no need to worry about their mental endurance.
As for the final conflict over divine power, it was even less of a problem for the clones. After all, the clones could not gain divine power to begin with. This choice of host for the power of a Jinchūriki seemed tailor-made for them.
The most ideal situation next would naturally be if Gusha could persuade the Mirage Tapir and Flaming Cow, so that the three avatars could each make a contract with a Beast of Catastrophe. This would give them much more confidence in facing the God of Chaos in the future.
