Poor man's MFT low light

Hey Reddit!

From available options for low light in the 50mm equivalent length, the area where I find my GH4 12-35mm f2.8 unsatisfactory, I found two relative cheap solutions.

One being the Mitakon Speedmaster 25mm f0.95 (450eu in my region) and the other the combination of Sigma 30mm f1.4 icm with a Lens Turbo II(approx. 450-500 second hand).

Which one of the two would you vote for! Any other suggestions around the same budget are welcome

edit: I preferably need as much light as possible to shoot without added lighting, something like this https://vimeo.com/98307452