Feature Request: Potion effects and item overrides for challenger mobs

It'd be extremely helpful if we could define potion effects for challenger mobs to spawn with, not just inflict.

Also, mobs like skeletons, piglins, wither skeletons, etc, often spawn with their own equipment that seems to override the challenger mob's desired equipment. It would be fantastic if we could choose to do the opposite, overriding a skeleton's bow, wither skeleton's stone sword, piglin's gold armor etc. Thank you for your time!