I have to stay i am in a very similar position, however I am just starting to stream.

I have both a mixer account and a twitch account, however as you know, I am on xbox, and play games which require the area of the UI the twitch broadcasting bar covers.

If you play games which dont require this area then maybe stick to twitch, if you need it mixer?

However as well as that’s I use these streaming services to record gameplay to upload to sites like Instagram and YouTube. So in that case I would prefer mixer. But if you want to build the live audience stick to twitch.

Let me know your plan and maybe we can collaborate in the future!