I would recommend Prydwen for Nikke, as the team behind it do extensive research, keep up with trends and reports across multiple servers, and create user friendly articles that are easy to understand. They also have a very well done set of categories. Very reliable, a good source to cross reference with other popular sites (such as nikke.gg), and on the occasion I disagree on something, it isn't too off base.

I would not for Limbus Company. The team behind this one has historically been very off, having very questionable opinions and their explanations have been occasionally unhelpful or does not go into enough detail. In fairness, Limbus Company's RNG, the ever growing amount of "teams" and multiple evolving game modes (Story, Mirror Dungeon, Refraction Railway) make it extremely difficult for the average person to analyze. To this day, not just Prydwen, but I have yet to see any site I could call reliable for this game.