The reason is very simple. A Grandmaster at the ultimate peak of one system and the pinnacle of another could only be considered to have stepped into the level of a Marquis Rank Defender Envoy. But a Grandmaster at the ultimate peak of two systems would be considered strong even among Marquis Rank Defender Envoys.
Xun Qu was indeed a Defender Envoy. However, when it came to strength, he had not even touched the threshold of the Marquis Rank.
Under such circumstances, a General Rank Defender Envoy coupled with a very weak Marquis Rank Defender Envoy was far less useful than a single powerful Marquis Rank Defender Envoy.
Therefore, Ji Tianlu would rather have Xun Qu leave and escort a few Demon Evils back from the Capital City than have him stay in Mountain-Breaking City all the time.
This was his initial thought. But now—looking at the imposing Shen Changqing before him, whose depth Ji Tianlu simply couldn't fathom at a glance, a shocking guess began to form in his mind.