Good luck with the gobbos! Let me know how your fungus hoarding exploits turn out, and please feel free to make suggestions, throw tomatoes, etc. in my Night Goblins thread!
About animosity, the ability to overcome animosity was a feature of the forest goblins i borrowed. I also borrowed boss poles and house ruled that line of sight is needed to benefit from it.
The original night goblin warband uses a single roll for the whole warband, on a 1, the entire warband does nothing but squabble... i prefer Da Mob Rulez method even if it takes longer.