Lore-friendly playstyle/itemization for Shadowheart? (Acts 1 & 2)

The Shar-worshipping crazy goth chick is a great character concept. Trouble is, the game seems to throw a lot of great light-related cleric spells and equipment at us, and all the alternatives seem to be bad. From an RP point of view, Shadowheart obviously shouldn’t be wielding a light-emitting mace, wearing radiance armor,...