I'm developing an NPC whose area of expertise is night assault. Variant Human Rogue (Assassin) with Goggles of Night and the Skulker feat. My reasoning is thus:
- Goggles of Night: Total darkness = dim light (within 60 feet).
- (Variant Human) Skulker: dim light doesn't impose disadvantage on Wisdom (perception) checks.
Therefore, he can see fine at night within 60 feet. Therefore, he doesn't have disadvantage on attacks in dim light within 60 feet.
- (Rogue 4) Mobility: disengage is not needed to avoid AoO against a target you attack
As such, by my reasoning, he'll be able to hide perfectly against characters without darkvision, and reasonably well against characters with darkvision that do not have skulker, so long as he is in total darkness (or anything else that lightly obscures). Therefore, sneak attacks for days until somebody turns the lights on.
Is this right, or is my logic on Skulker vastly overvaluing the feat?