Alex wanted to try making Fire Spiritual Root Improvement pills next, which he had promised his soldiers. Along with that, he also thought of making Yin Spiritual Root Improvement pills.
However, because he did not have the Supreme roots for either of those, he was not so confident in making them before his family was to leave.
Based on his estimate, it would take him at least 3 years to make just the pill for Fire Spiritual root alone.
Alex chose to spend that time with his family instead. He hoped they could make any and all improvements to their bodies on their own in the Immortal realm once they left.
Alex spent time with his mother, learning from her what he could, teaching her what he knew.
He spent time with his father, fighting from time to time, talking the other time.
Ronron liked to spend time with her sister and train her as much as she could before she had to leave, and Alex inadvertently ended up spending time with her that way.