In a way fighting one of the demon kings would be like killing three birds with one stone in Quinn's mind. One it would allow him to gather information about where Immortui was, two it would allow him to obtain a new blood aura upgrade and see if there was a further evolution.
Lastly, just as Anon stated, it would allow him to know the level of the demon kings, and give him an idea of how close he was to Immortui's strength. Having taken out what was believed to be one of the last of Immortui's powerful dedicated followers, it would even take him some time to come up with something that the other's couldn't handle.
'There are a lot of strong people still, Sil, Chris, Peter, Layla. All of them have the capabilities to protect themselves from the dedicated followers. Even Andy was a big help against Magnus.' Quinn thought.
