Context

I've found that the RFTools spawner is quite easy to use in conjunction with AE2 to automate getting some mob drops. However, it seems that many modded mobs aren't configured to spawn in it. Any syringe from a non-vanilla or non-animalium mob will display "nullRF" and list no ingredients required to spawn it.

Judging by the fact that animalium mobs are configured properly, it looks like the rest can also be added. Ones that I've shown interest in but haven't worked include Shadow Monsters (to automate shadow gem collection), Player Mobs (to get the death compass singularity), Trumpet skeletons (doot-doot), and Dire Wolves (because they need to be punished for spawning inside my base).

It seems that this topic has been loosely discussed in #2289 and #2150, however they mostly revolved around hiding the inactive syringes from JEI. I personally believe it would be better to configure the functionality to work properly.