Decided to give dynamic GI another try, as it really helps with the atmosphere. Seems that this time I managed to pull this off.
No bleeding issues, since I'm raytracing instead of cone tracing this time.
Also supports infinite bounces.
Main cost is about 300mb of VRAM usage, but I could bring it down by an half, I guess.
Stabilization time could be an issue as well, but since the world isn't changing very rapidly, I'm not that worried about it.