Help me decide! Miraheze or Wikidot?

Hello y'all. I'm in a bit of a conundrum right now. I really want to start an Art RPG that uses a forum + wiki set-up, but I am having great trouble deciding on what wikifarm to use.

My two options that I have narrowed down are ProBoards + Miraheze, or Wikidot.

On one hand, Proboards has tracking out the wazoo on their forums and Miraheze had a scare last year about shutting down, so I am not sure how much I trust either of those sites. On the other hand, while Wikidot has both a wiki and forum in their services together, the free tier only allows for 300mb of storage. In any other wiki I feel like that would be fine, but since this one will be so heavily art-focused, I am worried that space will run out quite quickly.

I don't know. What are your thoughts and opinions? Do you have any experience with any of these services? I would love to know. Thank you!