Is it possible to apply the affix Adaptable to every tier? I want every tier to have more than 1 affix (ie. 1 always reserved for adaptable)

If I add a mob to the alwaysOnEntity array...
a) does this make that mob a champion?
i) If true then can you add an option to not make them considered a champion?

b) does this mob have particle effects?
i) If true then can you add an option that only adds the particle effects to champions?

c) If I want all mobs to spawn with the affix adaptable, then do I have to manually add every single mob to this array?

If one of my villagers gets affected by the affix Plague, will they remain plagued forever, or will it go away over time?