In a completely spontaneous burst of willpower and programming, I've implemented a "challenge mode" for VSH.
You can type !halechallenge (or go through the !hale menu) and enable challenge mode. When it's your turn as a boss with challenge mode enabled, the other team will continuously respawn upon death.
The goal being for hale to get as many kills as possible before dying.
The mode is a WIP, but I think it's pretty good for release on the servers. We'll continuously improve and tweak things, so be sure to report any issues or suggest gameplay changes for it.