There was a limit to how many people Alex could carry within his Soul Space, even if they dampened every little Intent and Spiritual sense.
As such, from the very beginning, the idea of bringing along a group of soldiers to the other continent had been a bad one.
After testing a bit, Alex had realized that he could only carry about 5000 soldiers without feeling anything for his normal day-to-day life.
At 6000, he felt discomfort, and at 7000 his mind felt heavy. At 8000 and 9000, he truly started feeling pain.
At 10 thousand, his mind felt as though it had somehow immolated itself.
When coming up with plans to attack the Emperor, the first plan he had was to just take Hao Ya over there secretly and have her fix the formation so he could teleport the others.