Jargal made a good case for acolytes not being meant to fight serious menaces like daemons themselves. OK some players might like beating a daemon for those big XP awards but yeah, others might think it's more important to warn local authorities about a major menace.
So how do you go about calling in the cavalry if you find something that takes a lot of power to deal with?
Adeptus arbites are an obvious first choice. Especially if dealing with normal heretical filth or even xenos. With flamers they might deal with minor daemonic issues. Same with local PDF. But if you call them in to deal with even minor daemonic issues they may all end up being killed for security reasons.
With daemons, a force of adeptus soritas might be a good choice.
I'm not talking about using influences to bring in someone, BTW, I mean alerting local authorities to do their jobs. Any ideas on that?