Li Yao's situation wasn't particularly promising right now. Although the roof had fewer monsters than the ground, its wider field of vision wasn't much of a problem for him due to the Ranger's passive effect that allowed him to move stealthily in the darkness.
However, if he decided to strike, he would invariably attract a few monsters.
In such circumstances, summoning the Fire Hawk was not ideal. Its intense aura was highly conspicuous to the monsters, who were heavily sensitive to any energy fluctuations. The Fire Hawk's appearance was as conspicuous as a firefly in the dead of night, bound to incite a barrage of attacks.
Conversely, if the Spider were summoned, it could potentially hold its own against the monsters one vs one, but it wouldn't stand a chance against a horde.
Although the ground-level monsters were densely clustered, the fallen debris of many buildings, boulders, and the layout of the streets served to scatter them.