BMPCC4K DOCUMENTARY RIG SUGGESTIONS

Hi everyone,

I've had my BMPCC4K for a while now and I need to upgrade it. My primary work is documentary and so far I just have a cage, microphone, and lens and was wondering what items do you recommend for me to kit out the camera which is cheap and reliable. I know black Friday has passed, but are there any more sales for the UK that people recommend buying? What monitor? Which battery and which cage accessories apart from the main cage?