This challenge was actually impossible to be won by only 150 people. Each of those orcs possessed the same strength as fighters at the intermediate level of the Earth Realm. Each of those Uruks was at the same level as fighters at the intermediate level and the berserker Uruks had at least the same strength as fighters at the peak level. This horde of a combination of 2,000 orcs had a very terrifying amount of combat power.
In Alex's previous life, to complete this challenge, a country had to gather all of its best fighters for one pillar. Generally, it took about 500 fighters at the peak of the Earth Realm to complete this challenge. But that number could only get very few points. It was the minimum amount.