Interior render (help)

Hi, I know that this has been covered several times,
but I could really use some help and mabye some of you did already found the best way to render dark environment that:

I’m preparing a short video about the reconstruction of our new offices in cycles,
having lot of complex materials and unfortunatelly some objects with metal net that are causing lot of noise and oh boy, time wont help:)

  • portals does not work (adds more noise)
  • I dont want to use denoiser since it lowers the qualitty
  • I would rather not clamp light, since I loose lot of the information

  • should I try different renderer? corona for blender mabye?
  • should change the materils of the nets? (walls + chairs)