It was undoubtedly best to wait until a cultivator had reached their limit before consuming a Phoenix Soul Fruit and being reborn through nirvana. That way, they could absorb the fruit's essence and break through their previous limits, maximizing their strength. This was especially true now that cultivators no longer had to worry about running out of life force. In the past, without a Ginseng Fruit Tree or Ginseng Pills to replenish their life force, cultivators had to consume a Phoenix Soul Fruit and undergo nirvana before their life force was exhausted. As a result, they couldn't necessarily maximize their strength.
Now that Chi Xue and the others had a Ginseng Fruit Tree, they no longer had to worry about running out of life force. Once they reached the limits of what they could achieve, consuming a Phoenix Soul Fruit and undergoing nirvana would undoubtedly let them maximize their strength. After all, a cultivator's strength couldn't increase without limit, even if they could live for endless ages. Every cultivator faced bottlenecks, and unless they could break through one, it would remain their limit.
As Chi Xue had said, Ling Tian and his people weren't their only enemies. Even though Ling Tian was currently their sworn enemy, their most important foe was still the Lord of the Universe. After all, only by breaking free of the Lord of the Universe's restraints could they escape their fate of eventual death.
The Lord of the Universe was incredibly powerful. They could only hope to break free of his restraints by raising their strength as much as possible and reaching a certain limit. That made the timing of consuming a Phoenix Soul Fruit and undergoing nirvana crucial. At the very least, now was not the best time.
After joining Chi Xue, Po Di, and