Troublesome Plan

The path to the Halls of the Dead Serpent was a rocky climb. The difficulty was moderate, at worst... but it did require time to navigate. 

If the first encounter went poorly, upwards of 100 adventurers of the Brazen Guard collective would be funneled into that narrow escapeway. More likely, they would be forced off of the sheer cliff to crash into the white-water rapids below. 

Tycondrius doubted even a Gold-Rank adventurer could survive the fall... without magical assistance, of course. 

Tanamar had a skill that allowed him limited flight. Centurion Zenon Skyreaper and Athena Vanzano could levitate and (reasonably) glide with the aid of their magical abilities. 

Gold-Rank Weaponmaster Bannok and Priestess Ariadne would likely drop like rocks. Hunter Felinus would probably fall... very gracefully.