Sneaking Imp Chain Familiar vs the World: an analysis (data collected)

[Gignere]

Light conditions do not matter when the Imp is already invisible.

If you think the data I present is insufficiently discerning, I encourage you to present your own, with your own criteria and methodology.

I have never had a DM ruled that because the enemy is invisible you wouldn’t have disadvantage to see if you relied on darkvision in total darkness to see the invisible creature.