Hey @Soul_Easer
Let me try help you on lighting. There are many resources on raytracing and GPU lightmass and I suggest you check out VR Division on YouTube, they have some great tutorials regarding raytracing and GPU lightmaps. William Fauchner also has some great in depth lighting videos.
Lighting for archviz is very much a science and an art mixed together 
Your choice of static and dynamic lighting will depend a lot on your final product. If you are purely rendering still imagery or cinematic video, dynamic can be used as performance is not really important to the final product. Here you can use Raytracing and GPU lightmass to achieve those photoreal scenes you are looking for. GPU lightmaps is not even that important if you are using RTX to its fullest capability.
If your final product is for presentation of an interactive experience in first person, then you could use only dynamic or a combination of static, it will all depend on your performance targets and the target hardware of your final product.
If your target hardware is VR or mobile. Then static lighting is generally the only way to go. In some VR cases you can get away with a dynamic directional light, but again depends on what performance you are looking for. RTX is out of the question.
It is also not all about lighting methods. Reflections, post process, shaders, textures, engine settings and project settings all play together to achieve the best results.
It’s all about a balance of target hardware, performance and quality.
Good luck!